8 ms·

M8.7 earthquake in Western Pacific, tsunami warning issued

864 points by jandrewrogers 1y ago

andsoitis 1y ago
Quick link to the tsunami view: https://www.tsunami.gov/ https://www.tsunami.gov/ Just “watch” level for US west coast, but warning level for Hawaii and Alaska.
- irjustin 1y ago
  [flagged]
- _fs 1y ago
  Air alarms are going off in Hawaii. Still a few hours away, but they are not joking around. Saying it can wrap around all the islands and hit anywhere
  - nytesky 1y ago
    It will arrive in California in the middle of the night. Hope they don’t materialize.
  - supportengineer 1y ago
    I have family staying in Waikiki
  - Taniwha 1y ago
    Phone just went off screaming with a warning here in NZ - more a "stay away from the water" warning than a "head for the hills" one
    - seb1204 1y ago
      Impressive, glad the alarm chain works. And from what you say the warning message is also clear and understandable. Not tech or geology jargon that people don't understand and then take no or the wrong actions.
- benzible 1y ago
  Upgraded to an "advisory" for the California coast.
- dragonwriter 1y ago
  Watch has been upgraded to Warning (Aleutian Islands and California from Cape Mendocino to the Oregon border) or Advisory (California from Cape Mendocino south, and pretty much everything from the California/Oregon border to Alaska until you reach the Aleutian Islands, it looks like.)
bicx 1y ago
That area of Russia has seen quite a bit of massive seismic activity over the last couple of weeks. I keep getting earthquake alerts about each one.
- grigri907 1y ago
  What do you use for alerts?
  - mayneack 1y ago
    I use MyShake which will let me get alerts based on specific magnitude cutoffs. I actually just ratcheted up my "global" alert from 7.5 to 8 because of all the alerts from the last couple weeks in the pacific.
yinser 1y ago
That is _really_ big. It will likely crack the top 8 ever recorded. https://en.wikipedia.org/wiki/Lists_of_earthquakes https://en.wikipedia.org/wiki/Lists_of_earthquakes
- ac29 1y ago
  By magnitude it would be the second largest on that list
  - addaon 1y ago
    Multiple lists. On the list of strongest by magnitude, it would be in a three-way tie for 7th if there's no further revision to the magnitude estimate (which there usually is). It would be second by magnitude on the list of deadliest earthquakes, but thankfully due to location will not likely make that list.
  - BalinKing 1y ago
    The first list on that page is specifically for the deadliest earthquakes, and so it only includes earthquakes with 100,000+ fatalities. The ranking by magnitude is farther down (and according to that list, a magnitude of 8.8 would make it tied for sixth place).
- swader999 1y ago
  I think it has been revised to 8. Earth is going off today. Edit my mistake, 8.8 now!
  - nsingh2 1y ago
    The other way around it seems, on `07-29-2025 23:24:56 UTC` went from 8 to 8.7 [1] [1] Table on https://www.tsunami.gov/ https://www.tsunami.gov/
    - adzm 1y ago
      Looks like it was just updated to 8.8?
lordswork 1y ago
https://www.conservation.ca.gov/cgs/tsunami/maps https://www.conservation.ca.gov/cgs/tsunami/maps is getting a hug of death :( If anyone gets on, please post a screenshot.
- wging 1y ago
  The USA also has a site that seems to be up at the moment. Without seeing the CA version I'm not sure how it differs, but I suspect it's possible for Canadians to get some useful local information from it: https://www.tsunami.gov/ https://www.tsunami.gov/
  - deleted 1y ago
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    - deleted 1y ago
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  - sugarpimpdorsey 1y ago
    ca.gov is California, not Canada. But our funny-accented cousins can access useful information on the .gov as well (the entire west coast of Canada is under tsunami watch at the moment).
    - Waterluvian 1y ago
      Yeah but for how much longer? It’s a fire sale on anything intellectual down there.
      - TrnsltLife 1y ago
        I can't wait for Wexit to secede/succeed so we can welcome our beloved new territories with open arms.
  - xav0989 1y ago
    Anything that ends in .gov is related to a government entity in the US. Other countries don’t get access to that TLD.
mordechai9000 1y ago
Has anyone heard how bad it was in Petropovlosk? USGS estimates "severe" shaking with the possibility of moderate to heavy damage and a chance of fatalities. They have had quite a swarm of quakes there over the last couple of weeks, including one that was M7+ around the 20th.
- decimalenough 1y ago
  It's a very remote, very thinly populated area. The entire Kamchatka peninsula has under 300,000 people, who (statistically) have 1 km2 each.
  - cozzyd 1y ago
    Sure but a bunch of those people live in Petropavlovsk and surroundings
    - yreew 1y ago
      [flagged]
- czhu12 1y ago
  On Twitter, a search for Russia brings up some videos of pretty severe shaking
  - deleted 1y ago
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- deleted 1y ago
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- shusaku 1y ago
  So far the news here has only shown damage to a school (which apparently was empty due to repair work), and some bad flooding in one part. Let’s hope for the best.
- rhet0rica 1y ago
discordance 1y ago
Interactive map: https://earthquake.usgs.gov/earthquakes/eventpage/us6000qw60/map https://earthquake.usgs.gov/earthquakes/eventpage/us6000qw60...
nodesocket 1y ago
Can the wave be seen and tracked from planes above? I know they can travel at upwards of 300+mph but given the distance from Russia to the west coast seems like it should be able to be tracked.
- swader999 1y ago
  You can see bouys displaced by the seismic event, some up to one foot close by. Pretty crazy
- gosub100 1y ago
  No. When they travel at that speed they are not visible. Only when they hit shallow water (a necessary , but not sufficient, condition) do they slow down and become a threat.
  - deleted 1y ago
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- dboreham 1y ago
  Space-based assets.
- nessex 1y ago
  There are planes, buoys and other things being mentioned on the news here in Japan as ways things are being tracked. Maybe not what you meant, but tracking the wave isn't necessarily correct. There are many waves, and the initial wave is often (in this case also) not the largest. The news mentioned a previous similar event where the largest wave was 4 hours later.
swader999 1y ago
Dutchsinse coverage. https://youtu.be/58ab1phrFF0?si=gb_gpEld8uLTDu8M https://youtu.be/58ab1phrFF0?si=gb_gpEld8uLTDu8M
contingencies 1y ago
AIS map of vessels in the area: https://www.marinetraffic.com/en/ais/home/centerx:166.7/centery:52.5/zoom:5 https://www.marinetraffic.com/en/ais/home/centerx:166.7/cent... A fairly small US fishing vessel is in relative proximity... https://www.marinetraffic.com/en/ais/details/ships/shipid:436732/mmsi:367092390/imo:0/vessel:EVENING_STAR https://www.marinetraffic.com/en/ais/details/ships/shipid:43... Talked to the AI which said: MMI 4.5 in the context of an M8.7 quake, for your vessel: Danger level from shaking alone: Very low in open water. Danger from tsunami in the open ocean: Very low (unless extremely close to epicenter). Prime danger: If near shore, from tsunami run-up, NOT the shaking. Actionable advice: Remain in deep water until tsunami warnings have cleared; proceed to port only when officially safe. Monitor official maritime and tsunami alerts closely after any major earthquake. That's interesting. Mental note, if piloting a vessel in a tsunami, head to deep water.
- temp0826 1y ago
  Makes sense. More cushion for the pushin.
- mlyle 1y ago
  > That's interesting. Mental note, if piloting a vessel in a tsunami, head to deep water. E.g. the 2011 tsunami may have had a height of 1.2m or so in open ocean, but when concentrated by shallower water and a bay inlet reached 40m.
  - x______________ 1y ago
    Here's a visual of your thoughts from the Fukushima event: https://m.youtube.com/watch?v=-VcWF8dIDj4 https://m.youtube.com/watch?v=-VcWF8dIDj4 Japan, Tsunami. Coast Guard ship rides over the tsunami waves. 日本 - 津波 4.1M views · 14 years ago
    - mlyle 1y ago
      Neat video. It seems to capture the middle between "super high coastal wave" and "shallow but long duration wave in deep water". That's what you'd get with coastal waters several tens of meters deep.
decimalenough 1y ago
Japan forecasting tsunamis up to 3m across basically the entire eastern coast. First waves will hit within 10 minutes. https://www.nhk.or.jp/kishou-saigai/tsunami/ https://www.nhk.or.jp/kishou-saigai/tsunami/ https://www3.nhk.or.jp/news/live/ https://www3.nhk.or.jp/news/live/ (live, Japanese) https://www3.nhk.or.jp/nhkworld/en/live/ https://www3.nhk.or.jp/nhkworld/en/live/ (live, English) The east coast is also where the vast majority of Japan's population lives, and was previously hit by the 2011 tsunami (Fukushima and all that). We're about to find out the hard way what lessons they have learned. Update: First detected wave in Nemuro, Hokkaido (northernmost Japan) was only 30cm. There may be more. Waves of 3-4m have apparently already hit Kamchatka in Russia. Update 2: We're almost an hour in and highest waves to actually hit Japan remain only 40 cm. It looks unlikely that this will cause major damage.
- fblp 1y ago
  Here are some live streams.. No action yet. Fingers crossed! From a helicopter Japanese KATU news https://www.youtube.com/live/mBQHNV7cqrM?si=lwqB5YHknA7KUTY_ https://www.youtube.com/live/mBQHNV7cqrM?si=lwqB5YHknA7KUTY_ Webcams https://www.youtube.com/live/5pTPKHJxQ4g?si=xWe5MkLKIZ3N5I8D https://www.youtube.com/live/5pTPKHJxQ4g?si=xWe5MkLKIZ3N5I8D Hawaii news https://m.youtube.com/watch?v=lVy5nLWruu0&pp=ygUSSmFwYW4gdHN1bmFtaSBsaXZl https://m.youtube.com/watch?v=lVy5nLWruu0&pp=ygUSSmFwYW4gdHN...
  - ls-a 1y ago
    Now that things have calmed i can say that the webcam chats were very entertaining
- Brystephor 1y ago
  How big was the 2011 tsunami? Is 3m bigger or smaller?
  - decimalenough 1y ago
    It's complicated. Tsunami forecasting is a very inexact science and "3m" means "very large". The average actual height in eastern Japan (Tohoku) was 4-6m, but there were peaks up to 20m in places like Ofunato where the local geography funneled all the water upwards. https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_and_tsunami#Tsunami https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_an...
ajsnigrutin 1y ago
Russian media has some videos of the earthquake (RT, etc.), telegram channels have some tsunami videos, eg: https://t.me/Slavyangrad/136436 https://t.me/Slavyangrad/136436 Nothing yet from japan
dhx 1y ago
~1.3m water column height variation observed by the closest DART buoy at 48°7'34" N 163°22'35" E (5787m nominal water depth).[1] [1] https://www.ndbc.noaa.gov/station_page.php?station=21416&type=2&seriestime=20250729232715 https://www.ndbc.noaa.gov/station_page.php?station=21416&typ...
- hn_go_brrrrr 1y ago
  Is that a lot?
  - dhx 1y ago
    Not that it's much use to compare, but the closest DART buoy 21418 to the M9-9.1 2011 Tōhoku earthquake[1] (which had an epicentre just 72km East of Japan's east coast) recorded a water column height variation of ~3m.[2][3] The closest DART buoy to today's M8.7-8.8 earthquake is 21416 and this recorded a water column height variation of ~0.6m back in the M9-9.1 2011 Tōhoku earthquake.[4] [1] https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_and_tsunami https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_an... [2] https://www.ngdc.noaa.gov/hazard/data/DART/20110311_honshu/jpg/honshu_21418_21413.jpg https://www.ngdc.noaa.gov/hazard/data/DART/20110311_honshu/j... [3] https://www.ngdc.noaa.gov/hazard/dart/2011honshu_dart.html https://www.ngdc.noaa.gov/hazard/dart/2011honshu_dart.html [4] https://www.ngdc.noaa.gov/hazard/data/DART/20110311_honshu/jpg/honshu_North.jpg https://www.ngdc.noaa.gov/hazard/data/DART/20110311_honshu/j...
willyd1 1y ago
Map on USGS: https://earthquake.usgs.gov/earthquakes/eventpage/us6000qw60/map https://earthquake.usgs.gov/earthquakes/eventpage/us6000qw60...
deleted 1y ago
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techtonicwars 1y ago
[flagged]
- mehal 1y ago
  Very close to his atom arsenal
indigodaddy 1y ago
Agenda-free TV channel on YouTube has pretty good live/current coverage right now
- smcin 1y ago
  Which TV channel please? Link or name?
  - indigodaddy 1y ago
    He doesn't look to be live right now, but here is the channel: https://youtube.com/@agendafreetv?si=ROE1VAC1D6IlCcXl https://youtube.com/@agendafreetv?si=ROE1VAC1D6IlCcXl
    - smcin 1y ago
      Oh that's actually the name, I thought it was a diss on most media! Thanks.
barlog 1y ago
each Live cam. <https://www3.nhk.or.jp/news/html/20250730/k10014878741000.html https://www3.nhk.or.jp/news/html/20250730/k10014878741000.ht...>
vasusen 1y ago
My wife decided to not travel to Japan due to an impending warning from a manga for July 2025. I have been making fun of her all month only to get this tsunami warning now! https://en.wikipedia.org/wiki/July_2025_Japan_megaquake_prophecy https://en.wikipedia.org/wiki/July_2025_Japan_megaquake_prop.... > The 2021 reprint capitalizing off this revived popularity warned of a "real disaster" in July 2025, causing a minor case of mass hysteria in 2025 when summer trips to Japan from East Asia decreased markedly and several airlines even cancelled flights.
- Waterluvian 1y ago
  Sadly we won’t hear from the partners of everyone whose manga didn’t successfully predict a real disaster in a month.
  - refactor_master 1y ago
    That's because the other mangas forgot to adjust by +/- some 1000 km for location, 25 days, 365 days, 1825 days, or some other arbitrary but possibly nicely divisible number, for when and where it strikes. You also have to conveniently forget the things that don't sell mangas such as annual typhoons, heatwaves, and of course thousands of premature deaths from man-made causes such as pollution and poor lifestyle. Otherwise, if predicting disasters was easy, everybody would be doing it. No, it takes special, paper-based skills such as mangas , tarot cards, weekly horoscopes, etc.
    - jrflowers 1y ago
      I’m pretty sure they sell mangas about deaths from man made causes. I’m not an expert but I am fairly certain about this
    - Barbing 1y ago
      Reminded of the available $1m award from James Randi’s org that was never claimed b/c no one could ever do anything supernatural under reasonable testing conditions. (Woo is surely possible but all those who can pull it off were gifted abilities that are deactivated by non-monetary incentives)
RS-232 1y ago
[flagged]
ddtaylor 1y ago
What happens to the US West coast?
- dylan604 1y ago
  It moves to Arizona? Or is that the other "big one"?
- jjangkke 1y ago
  All the tectonics and volcanos that are underground are linked, these seismic events aren't just isolated on islands. I hate to say this but we can expect a major event in August. All I can tell people is to prepare but I see people just with blank expression, there is almost no concern at all which reminds me very much of November 2019.
  - mock-possum 1y ago
    Okay Charlie Frost
  - a-curious-crow 1y ago
    Evidence?
watkajtys 1y ago
There's some interesting visualizations of the quake here Nearby quakes, faults, movement visualization, etc. https://earthquakes.builtbyvibes.com/quake/m8.8-119-km-ese-of-petropavlovsk-kamchatsky-russia-us6000qw60 https://earthquakes.builtbyvibes.com/quake/m8.8-119-km-ese-o...
genewitch 1y ago
to put this in perspective, and please, if you work for USGS or whatever, correct me if i am wrong: this is roughly the same magnitude of the 1994 Northridge earthquake in California. i think i got the scale the wrong way around, the magnitudes reported now are only larger (than Richter) with smaller quakes compared to the Richter; it looks like 8.8ML ~= M8.8. Sorry, i looked at the chart the wrong way around.
- redwood 1y ago
  What? No that was a 6.7 or less than one hundredth an 8.8 on a log10 scale
  - deleted 1y ago
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- jandrewrogers 1y ago
  You are off by about a factor of 1,000. Each incremental increase in magnitude is 10^1.5 in power. The difference between 1994 Northridge and this one is 2.1, so roughly 10^3 difference in power.
  - rcthompson 1y ago
    I thought that it was a log10 scale, so each increment of 1 on the scale is a 10-fold power increase, not a 10^1.5-fold.
    - Dylan16807 1y ago
      It's a log10 scale measuring amplitude.
    - tim-- 1y ago
      This is power vs. energy. The Richter Scale is a logarithmic scale, based on shaking measurements (think of the old pencil-based seismograph!). Power. (10^1). The Moment Magnitude Scale (the more modern/replacement of Richter Scale) is based on energy. Geological organisations reporting on an earthquake will usually show this as "M <number>" or "Mw <number>". Richter works well for small-to-medium earthquakes, and it's not accurate for really large or distant earthquakes. The energy released in an earthquake increases exponentially, not just linearly. EDIT: The Moment Magnitude Scale is where the "10^1.5" figure is coming from. https://en.wikipedia.org/wiki/Moment_magnitude_scale https://en.wikipedia.org/wiki/Moment_magnitude_scale
deleted 1y ago
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ConanRus 1y ago
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tonyhart7 1y ago
hope everyone is safe
supportengineer 1y ago
I have family members who were in Hawaii (Haleiwa) today and they are wondering if they should try to beat the tsunami and get back to their hotel in Waikiki. I am afraid Waikiki will see flooding. I know Duke's and some other restaurants were closing early.
- Kozmik1 1y ago
  Do not stay in Haleiwa or go to Waikiki. Consult a map, and find some uphill areas above 100ft to drive to. Drive towards Mililani and wait it out in the upland areas. My kids are at camp right now on the North Shore and are being evacuated by bus to Mililani.
  - ehnto 1y ago
    I'm sorry you're going through that, it sounds like they will be safe in Mililani.
Kozmik1 1y ago
Waves at Midway Atoll and Guam are reported to be 3ft (1m) amplitude by Hawaii Governor Josh Green as of 6:24pm Hawaii Time
Dazzler5648 1y ago
I was parked at Selzer beach in Seaside, Oregon when the earthquake/tsunami news hit around 7:30pm. Within 30 minutes it was impossible to buy gas without queueing and now there is a pretty steady stream of cars heading out of town. As of 9pm it’s been upgraded to a warning up and down the coast. I was just thinking of tsunamis the two days ago in the Del Rey beach parking lot, where I noticed the locals seemed to park at the exit end of the lot, facing out. I moved my car to match because that just makes sense.
- illusive4080 1y ago
  I’ve never thought about a tsunami when visiting the beach in my life. Are they much more common in the Pacific? We go to the Gulf and Atlantic and it’s never something I think about. We usually go in June/July, so we don’t worry much about hurricanes either.
  - jajko 1y ago
    There is no Atlantic ring of fire, is there. What little places like Iceland show is nothing compared to what pacific has to offer in much larger area.
    - pixl97 1y ago
      While the Atlantic doesn't really have many faults that will generate earthquakes causing tsunamis there is always a risk of landslides creating large tsunamis up to what we'd consider mega-tsunamis. This said this is something that may have thousands of years between incidents.
deleted 1y ago
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thenthenthen 1y ago
Shanghai has relocated 280.000 people from its coast according to this article: https://mp.weixin.qq.com/s/HLf3PM29IqaWajMhflo_uA https://mp.weixin.qq.com/s/HLf3PM29IqaWajMhflo_uA Unclear if its related to the tsunami that is about to hit or the typhoon it is currently experiencing. Wild. Stay safe everyone!
- thenthenthen 1y ago
  Update: The yellow warning has been lifted
N19PEDL2 1y ago
It is the sixth strongest earthquake ever recorded on the planet.
PicassoCTs 1y ago
Any supervolcanoes nearby? How is https://en.wikipedia.org/wiki/Paektu_Mountain https://en.wikipedia.org/wiki/Paektu_Mountain holding up?
nabla9 1y ago
6th largest in the measurement history.
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jajko 1y ago
Just when I am about to depart on vacation to Sulawesi in Indonesia, mostly for diving and some culture and adventure... well at least Togian islands are not directly exposed to part of pacific ocean that generated this. I guess I will have to sleep with a big wooden log.
haunter 1y ago
Whales have been washed ashore in Chiba https://x.com/AZ_Intel_/status/1950395615944511821 https://x.com/AZ_Intel_/status/1950395615944511821
- sunaookami 1y ago
  Community Notes says: >Important Context: In the Japanese audio, a TV announcer says they don't know if this incident is related to the earthquake/tsunami: "We have no information indicating a connection with the recent tsunami". >Also, stranded whales in Tateyama have been observed since yesterday
ranguna 1y ago
Reading the news, it seems there was no significant impact in the neighbouring societies, except the death of sea life (whales in Chiba), is that right?
- KeplerBoy 1y ago
  I wonder how they died. I'd expect they are safe from a bit of shaking. Are there shock waves involved?
chrisgd 1y ago
Just downgraded to advisory in Hawaii (10:44pm HST)
user____name 1y ago
People tripping over eachother arguing whether a tsunami is a "wave" on a disaster warning submission... If HN was a village everyone would drown in the process.
- x______________ 1y ago
  Didn't it take years to solve the debate about light being a particle or a wave? ..I'll show myself out :)
LightBug1 1y ago
The US still has a National Earthquake Information Centre? Wow!
evrennetwork 1y ago
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x______________ 1y ago
Here is a 2 minute compilation video from a helicopter and other vantage points showing the waves crashing into the shores of Japan. https://old.reddit.com/r/interestingasfuck/comments/1mcwvpw/japan_right_now_as_tsunami_waves_begin/ https://old.reddit.com/r/interestingasfuck/comments/1mcwvpw/...
kozika 1y ago
I happened to be visiting Miyagi just before the tsunami struck, and I was really panicked. When I got out of the car, everyone's smartphones nearby suddenly started beeping. A message in Japanese, saying something like "TSUNAMI EVACUATE NOW," sounded throughout the area. At the time, my phone displayed a warning that a three-meter tsunami would hit the area within an hour. I waited on slightly higher area for about two hours, but the locals kept going about their usual business, and there were no announcements from the nearby police. Fortunately, nothing happened, but it's difficult to know which information to trust. Still, it's good that there's a system in place for evacuation alerts.
rufus_foreman 1y ago
The National Weather Service wants you to know that "There is no threat for tsunami impacts in North Dakota", https://x.com/NWSGrandForks/status/1950377134565785933 https://x.com/NWSGrandForks/status/1950377134565785933.
1xer 1y ago
Wow! I hope they stay safe. As others have pointed out it will break records [1] https://en.wikipedia.org/wiki/List_of_earthquakes_in_Japan https://en.wikipedia.org/wiki/List_of_earthquakes_in_Japan
perihelions 1y ago
Also, a volcano, https://www.newsweek.com/russia-klyuchevskoy-volcano-erupts-earthquake-evacuations-2106304 https://www.newsweek.com/russia-klyuchevskoy-volcano-erupts-... ("Russia's Klyuchevskoy Volcano Starts Erupting after Earthquake")
spullara 1y ago
Why are the predictions of the tsunami experts so poor? What can be done to get higher accuracy?
- Shank 1y ago
  I don’t think there’s a high false positive rate on these. They do happen pretty rarely, and a false negative is far worse than a false positive. Due to the tsunami wave propagation, it can sometimes take hours for significant waves to reach the coastline.
  - spullara 1y ago
    We just had another one in the SF Bay Area a few months ago where they were wildly off.
chasd00 1y ago
I’m in Costa Rica on vacation, hotel said the beach is closed but they didn’t know why (lol yeah right). Per tsunami alerts it should be hitting right now at 1-3M above tide, I don’t see any evidence on various beach livecams like Taramindo. I’m in puerto Jimenez which is on the inland side of a small peninsula in southern CR so not expecting much.

864 points by jandrewrogers 1y ago

Quick link to the tsunami view: https://www.tsunami.gov/ https://www.tsunami.gov/ Just “watch” level for US west coast, but warning level for Hawaii and Alaska.

irjustin 1y ago
[flagged]
_fs 1y ago
Air alarms are going off in Hawaii. Still a few hours away, but they are not joking around. Saying it can wrap around all the islands and hit anywhere
- nytesky 1y ago
  It will arrive in California in the middle of the night. Hope they don’t materialize.
- supportengineer 1y ago
  I have family staying in Waikiki
- Taniwha 1y ago
  Phone just went off screaming with a warning here in NZ - more a "stay away from the water" warning than a "head for the hills" one
  - seb1204 1y ago
    Impressive, glad the alarm chain works. And from what you say the warning message is also clear and understandable. Not tech or geology jargon that people don't understand and then take no or the wrong actions.
benzible 1y ago
Upgraded to an "advisory" for the California coast.
dragonwriter 1y ago
Watch has been upgraded to Warning (Aleutian Islands and California from Cape Mendocino to the Oregon border) or Advisory (California from Cape Mendocino south, and pretty much everything from the California/Oregon border to Alaska until you reach the Aleutian Islands, it looks like.)

bicx 1y ago

That area of Russia has seen quite a bit of massive seismic activity over the last couple of weeks. I keep getting earthquake alerts about each one.

grigri907 1y ago
What do you use for alerts?
- mayneack 1y ago
  I use MyShake which will let me get alerts based on specific magnitude cutoffs. I actually just ratcheted up my "global" alert from 7.5 to 8 because of all the alerts from the last couple weeks in the pacific.

yinser 1y ago

That is _really_ big. It will likely crack the top 8 ever recorded. https://en.wikipedia.org/wiki/Lists_of_earthquakes https://en.wikipedia.org/wiki/Lists_of_earthquakes

ac29 1y ago
By magnitude it would be the second largest on that list
- addaon 1y ago
  Multiple lists. On the list of strongest by magnitude, it would be in a three-way tie for 7th if there's no further revision to the magnitude estimate (which there usually is). It would be second by magnitude on the list of deadliest earthquakes, but thankfully due to location will not likely make that list.
- BalinKing 1y ago
  The first list on that page is specifically for the deadliest earthquakes, and so it only includes earthquakes with 100,000+ fatalities. The ranking by magnitude is farther down (and according to that list, a magnitude of 8.8 would make it tied for sixth place).
swader999 1y ago
I think it has been revised to 8. Earth is going off today. Edit my mistake, 8.8 now!
- nsingh2 1y ago
  The other way around it seems, on `07-29-2025 23:24:56 UTC` went from 8 to 8.7 [1] [1] Table on https://www.tsunami.gov/ https://www.tsunami.gov/
  - adzm 1y ago
    Looks like it was just updated to 8.8?

lordswork 1y ago

https://www.conservation.ca.gov/cgs/tsunami/maps https://www.conservation.ca.gov/cgs/tsunami/maps is getting a hug of death :( If anyone gets on, please post a screenshot.

wging 1y ago
The USA also has a site that seems to be up at the moment. Without seeing the CA version I'm not sure how it differs, but I suspect it's possible for Canadians to get some useful local information from it: https://www.tsunami.gov/ https://www.tsunami.gov/
- deleted 1y ago
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- sugarpimpdorsey 1y ago
  ca.gov is California, not Canada. But our funny-accented cousins can access useful information on the .gov as well (the entire west coast of Canada is under tsunami watch at the moment).
  - Waterluvian 1y ago
    Yeah but for how much longer? It’s a fire sale on anything intellectual down there.
    - TrnsltLife 1y ago
      I can't wait for Wexit to secede/succeed so we can welcome our beloved new territories with open arms.
- xav0989 1y ago
  Anything that ends in .gov is related to a government entity in the US. Other countries don’t get access to that TLD.

mordechai9000 1y ago

Has anyone heard how bad it was in Petropovlosk? USGS estimates "severe" shaking with the possibility of moderate to heavy damage and a chance of fatalities. They have had quite a swarm of quakes there over the last couple of weeks, including one that was M7+ around the 20th.

decimalenough 1y ago
It's a very remote, very thinly populated area. The entire Kamchatka peninsula has under 300,000 people, who (statistically) have 1 km2 each.
- cozzyd 1y ago
  Sure but a bunch of those people live in Petropavlovsk and surroundings
  - yreew 1y ago
    [flagged]
czhu12 1y ago
On Twitter, a search for Russia brings up some videos of pretty severe shaking
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shusaku 1y ago
So far the news here has only shown damage to a school (which apparently was empty due to repair work), and some bad flooding in one part. Let’s hope for the best.
rhet0rica 1y ago

discordance 1y ago

Interactive map: https://earthquake.usgs.gov/earthquakes/eventpage/us6000qw60/map https://earthquake.usgs.gov/earthquakes/eventpage/us6000qw60...

nodesocket 1y ago

Can the wave be seen and tracked from planes above? I know they can travel at upwards of 300+mph but given the distance from Russia to the west coast seems like it should be able to be tracked.

swader999 1y ago
You can see bouys displaced by the seismic event, some up to one foot close by. Pretty crazy
gosub100 1y ago
No. When they travel at that speed they are not visible. Only when they hit shallow water (a necessary , but not sufficient, condition) do they slow down and become a threat.
- deleted 1y ago
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dboreham 1y ago
Space-based assets.
nessex 1y ago
There are planes, buoys and other things being mentioned on the news here in Japan as ways things are being tracked. Maybe not what you meant, but tracking the wave isn't necessarily correct. There are many waves, and the initial wave is often (in this case also) not the largest. The news mentioned a previous similar event where the largest wave was 4 hours later.

swader999 1y ago

Dutchsinse coverage. https://youtu.be/58ab1phrFF0?si=gb_gpEld8uLTDu8M https://youtu.be/58ab1phrFF0?si=gb_gpEld8uLTDu8M

contingencies 1y ago

AIS map of vessels in the area: https://www.marinetraffic.com/en/ais/home/centerx:166.7/centery:52.5/zoom:5 https://www.marinetraffic.com/en/ais/home/centerx:166.7/cent... A fairly small US fishing vessel is in relative proximity... https://www.marinetraffic.com/en/ais/details/ships/shipid:436732/mmsi:367092390/imo:0/vessel:EVENING_STAR https://www.marinetraffic.com/en/ais/details/ships/shipid:43... Talked to the AI which said: MMI 4.5 in the context of an M8.7 quake, for your vessel: Danger level from shaking alone: Very low in open water. Danger from tsunami in the open ocean: Very low (unless extremely close to epicenter). Prime danger: If near shore, from tsunami run-up, NOT the shaking. Actionable advice: Remain in deep water until tsunami warnings have cleared; proceed to port only when officially safe. Monitor official maritime and tsunami alerts closely after any major earthquake. That's interesting. Mental note, if piloting a vessel in a tsunami, head to deep water.

temp0826 1y ago
Makes sense. More cushion for the pushin.
mlyle 1y ago
> That's interesting. Mental note, if piloting a vessel in a tsunami, head to deep water. E.g. the 2011 tsunami may have had a height of 1.2m or so in open ocean, but when concentrated by shallower water and a bay inlet reached 40m.
- x______________ 1y ago
  Here's a visual of your thoughts from the Fukushima event: https://m.youtube.com/watch?v=-VcWF8dIDj4 https://m.youtube.com/watch?v=-VcWF8dIDj4 Japan, Tsunami. Coast Guard ship rides over the tsunami waves. 日本 - 津波 4.1M views · 14 years ago
  - mlyle 1y ago
    Neat video. It seems to capture the middle between "super high coastal wave" and "shallow but long duration wave in deep water". That's what you'd get with coastal waters several tens of meters deep.

decimalenough 1y ago

Japan forecasting tsunamis up to 3m across basically the entire eastern coast. First waves will hit within 10 minutes. https://www.nhk.or.jp/kishou-saigai/tsunami/ https://www.nhk.or.jp/kishou-saigai/tsunami/ https://www3.nhk.or.jp/news/live/ https://www3.nhk.or.jp/news/live/ (live, Japanese) https://www3.nhk.or.jp/nhkworld/en/live/ https://www3.nhk.or.jp/nhkworld/en/live/ (live, English) The east coast is also where the vast majority of Japan's population lives, and was previously hit by the 2011 tsunami (Fukushima and all that). We're about to find out the hard way what lessons they have learned. Update: First detected wave in Nemuro, Hokkaido (northernmost Japan) was only 30cm. There may be more. Waves of 3-4m have apparently already hit Kamchatka in Russia. Update 2: We're almost an hour in and highest waves to actually hit Japan remain only 40 cm. It looks unlikely that this will cause major damage.

fblp 1y ago
Here are some live streams.. No action yet. Fingers crossed! From a helicopter Japanese KATU news https://www.youtube.com/live/mBQHNV7cqrM?si=lwqB5YHknA7KUTY_ https://www.youtube.com/live/mBQHNV7cqrM?si=lwqB5YHknA7KUTY_ Webcams https://www.youtube.com/live/5pTPKHJxQ4g?si=xWe5MkLKIZ3N5I8D https://www.youtube.com/live/5pTPKHJxQ4g?si=xWe5MkLKIZ3N5I8D Hawaii news https://m.youtube.com/watch?v=lVy5nLWruu0&pp=ygUSSmFwYW4gdHN1bmFtaSBsaXZl https://m.youtube.com/watch?v=lVy5nLWruu0&pp=ygUSSmFwYW4gdHN...
- ls-a 1y ago
  Now that things have calmed i can say that the webcam chats were very entertaining
Brystephor 1y ago
How big was the 2011 tsunami? Is 3m bigger or smaller?
- decimalenough 1y ago
  It's complicated. Tsunami forecasting is a very inexact science and "3m" means "very large". The average actual height in eastern Japan (Tohoku) was 4-6m, but there were peaks up to 20m in places like Ofunato where the local geography funneled all the water upwards. https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_and_tsunami#Tsunami https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_an...

ajsnigrutin 1y ago

Russian media has some videos of the earthquake (RT, etc.), telegram channels have some tsunami videos, eg: https://t.me/Slavyangrad/136436 https://t.me/Slavyangrad/136436 Nothing yet from japan

dhx 1y ago

~1.3m water column height variation observed by the closest DART buoy at 48°7'34" N 163°22'35" E (5787m nominal water depth).[1] [1] https://www.ndbc.noaa.gov/station_page.php?station=21416&type=2&seriestime=20250729232715 https://www.ndbc.noaa.gov/station_page.php?station=21416&typ...

hn_go_brrrrr 1y ago
Is that a lot?
- dhx 1y ago
  Not that it's much use to compare, but the closest DART buoy 21418 to the M9-9.1 2011 Tōhoku earthquake[1] (which had an epicentre just 72km East of Japan's east coast) recorded a water column height variation of ~3m.[2][3] The closest DART buoy to today's M8.7-8.8 earthquake is 21416 and this recorded a water column height variation of ~0.6m back in the M9-9.1 2011 Tōhoku earthquake.[4] [1] https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_and_tsunami https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_an... [2] https://www.ngdc.noaa.gov/hazard/data/DART/20110311_honshu/jpg/honshu_21418_21413.jpg https://www.ngdc.noaa.gov/hazard/data/DART/20110311_honshu/j... [3] https://www.ngdc.noaa.gov/hazard/dart/2011honshu_dart.html https://www.ngdc.noaa.gov/hazard/dart/2011honshu_dart.html [4] https://www.ngdc.noaa.gov/hazard/data/DART/20110311_honshu/jpg/honshu_North.jpg https://www.ngdc.noaa.gov/hazard/data/DART/20110311_honshu/j...

willyd1 1y ago

Map on USGS: https://earthquake.usgs.gov/earthquakes/eventpage/us6000qw60/map https://earthquake.usgs.gov/earthquakes/eventpage/us6000qw60...

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techtonicwars 1y ago

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mehal 1y ago
Very close to his atom arsenal

indigodaddy 1y ago

Agenda-free TV channel on YouTube has pretty good live/current coverage right now

smcin 1y ago
Which TV channel please? Link or name?
- indigodaddy 1y ago
  He doesn't look to be live right now, but here is the channel: https://youtube.com/@agendafreetv?si=ROE1VAC1D6IlCcXl https://youtube.com/@agendafreetv?si=ROE1VAC1D6IlCcXl
  - smcin 1y ago
    Oh that's actually the name, I thought it was a diss on most media! Thanks.

barlog 1y ago

each Live cam. <https://www3.nhk.or.jp/news/html/20250730/k10014878741000.html https://www3.nhk.or.jp/news/html/20250730/k10014878741000.ht...>

vasusen 1y ago

My wife decided to not travel to Japan due to an impending warning from a manga for July 2025. I have been making fun of her all month only to get this tsunami warning now! https://en.wikipedia.org/wiki/July_2025_Japan_megaquake_prophecy https://en.wikipedia.org/wiki/July_2025_Japan_megaquake_prop.... > The 2021 reprint capitalizing off this revived popularity warned of a "real disaster" in July 2025, causing a minor case of mass hysteria in 2025 when summer trips to Japan from East Asia decreased markedly and several airlines even cancelled flights.

Waterluvian 1y ago
Sadly we won’t hear from the partners of everyone whose manga didn’t successfully predict a real disaster in a month.
- refactor_master 1y ago
  That's because the other mangas forgot to adjust by +/- some 1000 km for location, 25 days, 365 days, 1825 days, or some other arbitrary but possibly nicely divisible number, for when and where it strikes. You also have to conveniently forget the things that don't sell mangas such as annual typhoons, heatwaves, and of course thousands of premature deaths from man-made causes such as pollution and poor lifestyle. Otherwise, if predicting disasters was easy, everybody would be doing it. No, it takes special, paper-based skills such as mangas , tarot cards, weekly horoscopes, etc.
  - jrflowers 1y ago
    I’m pretty sure they sell mangas about deaths from man made causes. I’m not an expert but I am fairly certain about this
  - Barbing 1y ago
    Reminded of the available $1m award from James Randi’s org that was never claimed b/c no one could ever do anything supernatural under reasonable testing conditions. (Woo is surely possible but all those who can pull it off were gifted abilities that are deactivated by non-monetary incentives)

RS-232 1y ago

[flagged]

ddtaylor 1y ago

What happens to the US West coast?

dylan604 1y ago
It moves to Arizona? Or is that the other "big one"?
jjangkke 1y ago
All the tectonics and volcanos that are underground are linked, these seismic events aren't just isolated on islands. I hate to say this but we can expect a major event in August. All I can tell people is to prepare but I see people just with blank expression, there is almost no concern at all which reminds me very much of November 2019.
- mock-possum 1y ago
  Okay Charlie Frost
- a-curious-crow 1y ago
  Evidence?

watkajtys 1y ago

There's some interesting visualizations of the quake here Nearby quakes, faults, movement visualization, etc. https://earthquakes.builtbyvibes.com/quake/m8.8-119-km-ese-of-petropavlovsk-kamchatsky-russia-us6000qw60 https://earthquakes.builtbyvibes.com/quake/m8.8-119-km-ese-o...

genewitch 1y ago

to put this in perspective, and please, if you work for USGS or whatever, correct me if i am wrong: this is roughly the same magnitude of the 1994 Northridge earthquake in California. i think i got the scale the wrong way around, the magnitudes reported now are only larger (than Richter) with smaller quakes compared to the Richter; it looks like 8.8ML ~= M8.8. Sorry, i looked at the chart the wrong way around.

redwood 1y ago
What? No that was a 6.7 or less than one hundredth an 8.8 on a log10 scale
- deleted 1y ago
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jandrewrogers 1y ago
You are off by about a factor of 1,000. Each incremental increase in magnitude is 10^1.5 in power. The difference between 1994 Northridge and this one is 2.1, so roughly 10^3 difference in power.
- rcthompson 1y ago
  I thought that it was a log10 scale, so each increment of 1 on the scale is a 10-fold power increase, not a 10^1.5-fold.
  - Dylan16807 1y ago
    It's a log10 scale measuring amplitude.
  - tim-- 1y ago
    This is power vs. energy. The Richter Scale is a logarithmic scale, based on shaking measurements (think of the old pencil-based seismograph!). Power. (10^1). The Moment Magnitude Scale (the more modern/replacement of Richter Scale) is based on energy. Geological organisations reporting on an earthquake will usually show this as "M <number>" or "Mw <number>". Richter works well for small-to-medium earthquakes, and it's not accurate for really large or distant earthquakes. The energy released in an earthquake increases exponentially, not just linearly. EDIT: The Moment Magnitude Scale is where the "10^1.5" figure is coming from. https://en.wikipedia.org/wiki/Moment_magnitude_scale https://en.wikipedia.org/wiki/Moment_magnitude_scale

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ConanRus 1y ago

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tonyhart7 1y ago

hope everyone is safe

supportengineer 1y ago

I have family members who were in Hawaii (Haleiwa) today and they are wondering if they should try to beat the tsunami and get back to their hotel in Waikiki. I am afraid Waikiki will see flooding. I know Duke's and some other restaurants were closing early.

Kozmik1 1y ago
Do not stay in Haleiwa or go to Waikiki. Consult a map, and find some uphill areas above 100ft to drive to. Drive towards Mililani and wait it out in the upland areas. My kids are at camp right now on the North Shore and are being evacuated by bus to Mililani.
- ehnto 1y ago
  I'm sorry you're going through that, it sounds like they will be safe in Mililani.

Kozmik1 1y ago

Waves at Midway Atoll and Guam are reported to be 3ft (1m) amplitude by Hawaii Governor Josh Green as of 6:24pm Hawaii Time

Dazzler5648 1y ago

I was parked at Selzer beach in Seaside, Oregon when the earthquake/tsunami news hit around 7:30pm. Within 30 minutes it was impossible to buy gas without queueing and now there is a pretty steady stream of cars heading out of town. As of 9pm it’s been upgraded to a warning up and down the coast. I was just thinking of tsunamis the two days ago in the Del Rey beach parking lot, where I noticed the locals seemed to park at the exit end of the lot, facing out. I moved my car to match because that just makes sense.

illusive4080 1y ago
I’ve never thought about a tsunami when visiting the beach in my life. Are they much more common in the Pacific? We go to the Gulf and Atlantic and it’s never something I think about. We usually go in June/July, so we don’t worry much about hurricanes either.
- jajko 1y ago
  There is no Atlantic ring of fire, is there. What little places like Iceland show is nothing compared to what pacific has to offer in much larger area.
  - pixl97 1y ago
    While the Atlantic doesn't really have many faults that will generate earthquakes causing tsunamis there is always a risk of landslides creating large tsunamis up to what we'd consider mega-tsunamis. This said this is something that may have thousands of years between incidents.

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thenthenthen 1y ago

Shanghai has relocated 280.000 people from its coast according to this article: https://mp.weixin.qq.com/s/HLf3PM29IqaWajMhflo_uA https://mp.weixin.qq.com/s/HLf3PM29IqaWajMhflo_uA Unclear if its related to the tsunami that is about to hit or the typhoon it is currently experiencing. Wild. Stay safe everyone!

thenthenthen 1y ago
Update: The yellow warning has been lifted

N19PEDL2 1y ago

It is the sixth strongest earthquake ever recorded on the planet.

PicassoCTs 1y ago

Any supervolcanoes nearby? How is https://en.wikipedia.org/wiki/Paektu_Mountain https://en.wikipedia.org/wiki/Paektu_Mountain holding up?

nabla9 1y ago

6th largest in the measurement history.

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jajko 1y ago

Just when I am about to depart on vacation to Sulawesi in Indonesia, mostly for diving and some culture and adventure... well at least Togian islands are not directly exposed to part of pacific ocean that generated this. I guess I will have to sleep with a big wooden log.

haunter 1y ago

Whales have been washed ashore in Chiba https://x.com/AZ_Intel_/status/1950395615944511821 https://x.com/AZ_Intel_/status/1950395615944511821

sunaookami 1y ago
Community Notes says: >Important Context: In the Japanese audio, a TV announcer says they don't know if this incident is related to the earthquake/tsunami: "We have no information indicating a connection with the recent tsunami". >Also, stranded whales in Tateyama have been observed since yesterday

ranguna 1y ago

Reading the news, it seems there was no significant impact in the neighbouring societies, except the death of sea life (whales in Chiba), is that right?

KeplerBoy 1y ago
I wonder how they died. I'd expect they are safe from a bit of shaking. Are there shock waves involved?

chrisgd 1y ago

Just downgraded to advisory in Hawaii (10:44pm HST)

user____name 1y ago

People tripping over eachother arguing whether a tsunami is a "wave" on a disaster warning submission... If HN was a village everyone would drown in the process.

x______________ 1y ago
Didn't it take years to solve the debate about light being a particle or a wave? ..I'll show myself out :)

LightBug1 1y ago

The US still has a National Earthquake Information Centre? Wow!

evrennetwork 1y ago

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x______________ 1y ago

Here is a 2 minute compilation video from a helicopter and other vantage points showing the waves crashing into the shores of Japan. https://old.reddit.com/r/interestingasfuck/comments/1mcwvpw/japan_right_now_as_tsunami_waves_begin/ https://old.reddit.com/r/interestingasfuck/comments/1mcwvpw/...

kozika 1y ago

I happened to be visiting Miyagi just before the tsunami struck, and I was really panicked. When I got out of the car, everyone's smartphones nearby suddenly started beeping. A message in Japanese, saying something like "TSUNAMI EVACUATE NOW," sounded throughout the area. At the time, my phone displayed a warning that a three-meter tsunami would hit the area within an hour. I waited on slightly higher area for about two hours, but the locals kept going about their usual business, and there were no announcements from the nearby police. Fortunately, nothing happened, but it's difficult to know which information to trust. Still, it's good that there's a system in place for evacuation alerts.

rufus_foreman 1y ago

The National Weather Service wants you to know that "There is no threat for tsunami impacts in North Dakota", https://x.com/NWSGrandForks/status/1950377134565785933 https://x.com/NWSGrandForks/status/1950377134565785933.

1xer 1y ago

Wow! I hope they stay safe. As others have pointed out it will break records [1] https://en.wikipedia.org/wiki/List_of_earthquakes_in_Japan https://en.wikipedia.org/wiki/List_of_earthquakes_in_Japan

perihelions 1y ago

Also, a volcano, https://www.newsweek.com/russia-klyuchevskoy-volcano-erupts-earthquake-evacuations-2106304 https://www.newsweek.com/russia-klyuchevskoy-volcano-erupts-... ("Russia's Klyuchevskoy Volcano Starts Erupting after Earthquake")

spullara 1y ago

Why are the predictions of the tsunami experts so poor? What can be done to get higher accuracy?

Shank 1y ago
I don’t think there’s a high false positive rate on these. They do happen pretty rarely, and a false negative is far worse than a false positive. Due to the tsunami wave propagation, it can sometimes take hours for significant waves to reach the coastline.
- spullara 1y ago
  We just had another one in the SF Bay Area a few months ago where they were wildly off.

chasd00 1y ago

I’m in Costa Rica on vacation, hotel said the beach is closed but they didn’t know why (lol yeah right). Per tsunami alerts it should be hitting right now at 1-3M above tide, I don’t see any evidence on various beach livecams like Taramindo. I’m in puerto Jimenez which is on the inland side of a small peninsula in southern CR so not expecting much.