6 ms·

First worry is always a tsunami, but in this case it seems like it only generated a max of ~20cm: https://www.tsunami.gov/events/PAAQ/2021/07/29/qwzteb/7/WEAK51

First worry is always a tsunami, but in this case it seems like it only generated a max of ~20cm: https://www.tsunami.gov/events/PAAQ/2021/07/29/qwzteb/7/WEAK51/WEAK51.txt https://www.tsunami.gov/events/PAAQ/2021/07/29/qwzteb/7/WEAK...

flareback 5y ago
That's what I was wondering, thanks for the info.
k_sze 5y ago
However, I wonder if this quake so up north would accelerate the breaking of icebergs.
- Turing_Machine 5y ago
  There's no sea ice that far south at this time of year. Alaska is huge, yo.
  - k_sze 5y ago
    Oh, right, I forgot we’re in summer.
sandworm101 5y ago
There is old joke that if you use metric when announcing a 50mm tsunami, half of Americans will run for the hills. "~20cm" could mean half a foot or 20 hundred meters depending on how much you remember from highschool. Many agencies have policies on how and where metric should be used in public announcements.
- spywaregorilla 5y ago
  fwiw pretty much all unfamiliar americans will associate 'centi' with small, not "hundred"(eth)
- gok 5y ago
  Eh we know what a 9mm bullet looks like
  - daneel_w 5y ago
    Yes, but how many of you reflect over the nomenclature? How many of you know the actual diameter of a "twenty-two" (even if spelled out as .22)? People don't often think about the meaning behind colloquialisms.
    - dogorman 5y ago
      American public schools have been using metric for decades. Science classes in American public schools use metric exclusively since the 80s at least. When you meet an American who makes a big deal out of not knowing what a meter is, 9 times out of 10 they're putting on a performative patriotic display mean to get a rise out of you. That, or they're quite elderly. Incidentally, .22 LR is nominally but not actually 0.22 inches in diameter. It's very slightly bigger than that. In the domain of ammunition, there is often a mismatch between actual diameter and nominal diameter.
      - sandworm101 5y ago
        With calibers there is a difference between american .22 and european .22. As I understand it, the american measurement is slightly larger as it includes a bit of the rifling groves whereas the European standard was only the bullet width. So the same bullet measures slightly larger on the american scale. Or I might have that backwards, one of the two is different. https://www.rifleshootermag.com/editorial/comparing-american-and-european-rifle-cartridges/83489 https://www.rifleshootermag.com/editorial/comparing-american...
        dogorman 5y ago
        From what I understand, ".22 LR" is nominally .22 inches, actually is .223 inches, and is labeled as 5.6x15mmR in Europe while actually being something like 5.66mm (the 'x15' is the length of the case in millimeters, and the R means rimmed.) They are called different things and both are not quite their nominal sizes, but I think they're interchangeable in practice.
- throwaheyy 5y ago
  Americans use metric units to measure the size of guns and drug hauls, I think they have at least a minimal understanding of the magnitude...
FunnyLookinHat 5y ago
We got an alert in Jefferson county letting us know specifically that there was no Tsunami.
temp0826 5y ago
Could have made the olympic surfing competitions interesting (which they moved sooner because of the storm that passed by)
- bamboozled 5y ago
  The Tsunami was in Alaska, not Japan.
  - aaomidi 5y ago
    You see, they're all connected to the same body of water. And if the tsunami was directional towards the Japanese coast it would've caused issues there.
    - bamboozled 5y ago
      I think we all know that. I just don't see how this had anything to do with typhoons and surf contests in Japan, seemed silly. I guess I didn't get the "joke"
  - akg_67 5y ago
    In Japan, TV advisory was extra rough seas (no tsunami) on pacific side throughout the day tomorrow (Friday) as a result of this earthquake.
  - ceejayoz 5y ago
    Here's the big Japanese tsunami that devastated Fukushima arriving in California. https://www.youtube.com/watch?v=jdMDCLwblkY https://www.youtube.com/watch?v=jdMDCLwblkY
    - vajrabum 5y ago
      I only know this because I clicked on some more stuff after looking at that but the Fukushima tsunami caused a fair amount of damage in the Santa Cruz, CA harbor both to docks and boats. Apparently the waves can get magnified when they go into a narrow channel or harbor. Another thing I only learned today reading the comments of that video is that tsunami literally means harbor wave in Japanese. https://www.youtube.com/watch?v=_dC_tf4mhO4 https://www.youtube.com/watch?v=_dC_tf4mhO4
cossatot 5y ago
The slip patch (where the two tectonic plates slip past each other) of the earthquake did not reach the sea floor, so it didn't generate a big tsunami [0]. If the purple colors in the finite fault map (indicating >2 m slip) reached the trench (the top of the first figure, or the red line in the second), then the earthquake would have displaced much more seawater. These finite fault maps are made using automated processing of the seismic waves from seismographs around the globe. It's pretty amazing to me that the resolution is so good, from what are not that different than sound waves. These tend to be pretty accurate, not just precise, and are validated from additional studies using different datasets over the subsequent years. [0]: https://earthquake.usgs.gov/earthquakes/eventpage/us6000f02w/finite-fault https://earthquake.usgs.gov/earthquakes/eventpage/us6000f02w...

flareback 5y ago

That's what I was wondering, thanks for the info.

k_sze 5y ago

However, I wonder if this quake so up north would accelerate the breaking of icebergs.

Turing_Machine 5y ago
There's no sea ice that far south at this time of year. Alaska is huge, yo.
- k_sze 5y ago
  Oh, right, I forgot we’re in summer.

sandworm101 5y ago

There is old joke that if you use metric when announcing a 50mm tsunami, half of Americans will run for the hills. "~20cm" could mean half a foot or 20 hundred meters depending on how much you remember from highschool. Many agencies have policies on how and where metric should be used in public announcements.

spywaregorilla 5y ago
fwiw pretty much all unfamiliar americans will associate 'centi' with small, not "hundred"(eth)
gok 5y ago
Eh we know what a 9mm bullet looks like
- daneel_w 5y ago
  Yes, but how many of you reflect over the nomenclature? How many of you know the actual diameter of a "twenty-two" (even if spelled out as .22)? People don't often think about the meaning behind colloquialisms.
  - dogorman 5y ago
    American public schools have been using metric for decades. Science classes in American public schools use metric exclusively since the 80s at least. When you meet an American who makes a big deal out of not knowing what a meter is, 9 times out of 10 they're putting on a performative patriotic display mean to get a rise out of you. That, or they're quite elderly. Incidentally, .22 LR is nominally but not actually 0.22 inches in diameter. It's very slightly bigger than that. In the domain of ammunition, there is often a mismatch between actual diameter and nominal diameter.
    - sandworm101 5y ago
      With calibers there is a difference between american .22 and european .22. As I understand it, the american measurement is slightly larger as it includes a bit of the rifling groves whereas the European standard was only the bullet width. So the same bullet measures slightly larger on the american scale. Or I might have that backwards, one of the two is different. https://www.rifleshootermag.com/editorial/comparing-american-and-european-rifle-cartridges/83489 https://www.rifleshootermag.com/editorial/comparing-american...
      - dogorman 5y ago
        From what I understand, ".22 LR" is nominally .22 inches, actually is .223 inches, and is labeled as 5.6x15mmR in Europe while actually being something like 5.66mm (the 'x15' is the length of the case in millimeters, and the R means rimmed.) They are called different things and both are not quite their nominal sizes, but I think they're interchangeable in practice.
throwaheyy 5y ago
Americans use metric units to measure the size of guns and drug hauls, I think they have at least a minimal understanding of the magnitude...

FunnyLookinHat 5y ago

We got an alert in Jefferson county letting us know specifically that there was no Tsunami.

temp0826 5y ago

Could have made the olympic surfing competitions interesting (which they moved sooner because of the storm that passed by)

bamboozled 5y ago
The Tsunami was in Alaska, not Japan.
- aaomidi 5y ago
  You see, they're all connected to the same body of water. And if the tsunami was directional towards the Japanese coast it would've caused issues there.
  - bamboozled 5y ago
    I think we all know that. I just don't see how this had anything to do with typhoons and surf contests in Japan, seemed silly. I guess I didn't get the "joke"
- akg_67 5y ago
  In Japan, TV advisory was extra rough seas (no tsunami) on pacific side throughout the day tomorrow (Friday) as a result of this earthquake.
- ceejayoz 5y ago
  Here's the big Japanese tsunami that devastated Fukushima arriving in California. https://www.youtube.com/watch?v=jdMDCLwblkY https://www.youtube.com/watch?v=jdMDCLwblkY
  - vajrabum 5y ago
    I only know this because I clicked on some more stuff after looking at that but the Fukushima tsunami caused a fair amount of damage in the Santa Cruz, CA harbor both to docks and boats. Apparently the waves can get magnified when they go into a narrow channel or harbor. Another thing I only learned today reading the comments of that video is that tsunami literally means harbor wave in Japanese. https://www.youtube.com/watch?v=_dC_tf4mhO4 https://www.youtube.com/watch?v=_dC_tf4mhO4

cossatot 5y ago

The slip patch (where the two tectonic plates slip past each other) of the earthquake did not reach the sea floor, so it didn't generate a big tsunami [0]. If the purple colors in the finite fault map (indicating >2 m slip) reached the trench (the top of the first figure, or the red line in the second), then the earthquake would have displaced much more seawater. These finite fault maps are made using automated processing of the seismic waves from seismographs around the globe. It's pretty amazing to me that the resolution is so good, from what are not that different than sound waves. These tend to be pretty accurate, not just precise, and are validated from additional studies using different datasets over the subsequent years. [0]: https://earthquake.usgs.gov/earthquakes/eventpage/us6000f02w/finite-fault https://earthquake.usgs.gov/earthquakes/eventpage/us6000f02w...