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Earthquake Causes 2.5-Meter Ground Slip in First-Ever Footage

94 points by dylan604 1y ago

aaron695 1y ago
[dead]
theideaofcoffee 1y ago
I'm getting older and pretty jaded, but this is genuinely amazing to see. Not only did an earthquake get captured, entire chunks of the earth moved both horizontally and vertically, measureable off of that video. I still get dumbfounded at the amount of energy involved in things like this, and how much potential is stored up in other faults getting ready to pop--and this was "just" a 7.7! Super interesting to see! We humans are but ants to this planet's heel, ready to be stomped upon.
wlesieutre 1y ago
Anybody know how property lines get reconciled after a fault slip like this?
- mistyvales 1y ago
  Think I just watched that Star Trek episode..
- db48x 1y ago
  Depends on the country, obviously. This videos was taken in Myanmar, so ask a real estate lawyer in Myanmar. Around here most boundaries are based on landmarks and other boundaries. If the land shifts horizontally then so do all or most of the borders.
  - swores 1y ago
    Somewhat ironic that you start by acknowledging that it will be different depending what country you're in, and then write an anecdote on a website used by an international audience saying "around here" with no mention of what "here" means to you! (Well, ironic is the wrong word unless you're Alanis Morrisette, but you know what I mean)
    - db48x 1y ago
      Since the rules vary, my location doesn’t really matter; you’re going to have to find out for sure what the rules are in your jurisdiction anyway.
- omcnoe 1y ago
  In New Zealand we use a special local coordinate system NZGD2000 that accounts for both tectonic drift and one-off Earthquake slip events. The numerical coordinate values stay the same but their mapping to real world positions change over time. Hence the coordinate converter requires date as a parameter: https://www.geodesy.linz.govt.nz/concord/ https://www.geodesy.linz.govt.nz/concord/ https://www.linz.govt.nz/guidance/survey/earthquakes/kaikoura-earthquakes/kaikoura-earthquake-coordinate-update https://www.linz.govt.nz/guidance/survey/earthquakes/kaikour...
dnemmers 1y ago
Video link: https://www.youtube.com/watch?v=dbEYe65eDdw https://www.youtube.com/watch?v=dbEYe65eDdw
- gnabgib 1y ago
  No, this is original the video: https://www.youtube.com/watch?v=77ubC4bcgRM https://www.youtube.com/watch?v=77ubC4bcgRM 2 months ago - https://news.ycombinator.com/item?id=43974910 https://news.ycombinator.com/item?id=43974910
  - deleted 1y ago
    [deleted]
  - frauhaus 1y ago
    And here’s the paper: https://pubs.geoscienceworld.org/ssa/tsr/article/5/3/281/659624/Curved-Fault-Slip-Captured-by-CCTV-Video-During https://pubs.geoscienceworld.org/ssa/tsr/article/5/3/281/659...
    - deleted 1y ago
      [deleted]
bthallplz 1y ago
I'm amazed to learn that we hadn't had video like this before, but it had to come about sometime!
- dylan604 1y ago
  The most active faults are not conducive to placing of video cameras. They could have been watching the San Andreas for years, but nothing much happens like this. Also, was this a known fault? Seems like a bad location to build anything if it was known.
  - AlotOfReading 1y ago
    Essentially all of myanmar is an active fault zone because it's sandwiched between 4 plates. The narrow cracks we see on the surface are just where the soil happened to separate this one time, not the only place movement can happen.
senectus1 1y ago
incredible footage. just mind bolggling to consider the energy involved here.
litia_shi 1y ago
This footage is incredible and invaluable for science. It really puts into perspective how much energy is released during an earthquake.
BrenBarn 1y ago
Although the pole mentioned in the video is interesting, for me the more prominent visual signal of the motion is another pole right near the center of the view. It starts out visible within the frame of the arch, near its right side. When the quake hits, this pole moves so far to the right that it's almost totally obscured behind the wall of the arch, and it can be seen swaying back and forth. Also, there is a pylon on the far right of the scene that seems to partially collapse. It's cool that we have this video, but sobering to remember that thousands of people died in this quake.
barbazoo 1y ago
Truly groundbreaking stuff.
interloxia 1y ago
Shawn Willsey, Geology Explained, has an 11min summary. https://www.youtube.com/watch?v=CfKFK4-HNmk https://www.youtube.com/watch?v=CfKFK4-HNmk

94 points by dylan604 1y ago

[dead]

I'm getting older and pretty jaded, but this is genuinely amazing to see. Not only did an earthquake get captured, entire chunks of the earth moved both horizontally and vertically, measureable off of that video. I still get dumbfounded at the amount of energy involved in things like this, and how much potential is stored up in other faults getting ready to pop--and this was "just" a 7.7! Super interesting to see! We humans are but ants to this planet's heel, ready to be stomped upon.

wlesieutre 1y ago

Anybody know how property lines get reconciled after a fault slip like this?

mistyvales 1y ago
Think I just watched that Star Trek episode..
db48x 1y ago
Depends on the country, obviously. This videos was taken in Myanmar, so ask a real estate lawyer in Myanmar. Around here most boundaries are based on landmarks and other boundaries. If the land shifts horizontally then so do all or most of the borders.
- swores 1y ago
  Somewhat ironic that you start by acknowledging that it will be different depending what country you're in, and then write an anecdote on a website used by an international audience saying "around here" with no mention of what "here" means to you! (Well, ironic is the wrong word unless you're Alanis Morrisette, but you know what I mean)
  - db48x 1y ago
    Since the rules vary, my location doesn’t really matter; you’re going to have to find out for sure what the rules are in your jurisdiction anyway.
omcnoe 1y ago
In New Zealand we use a special local coordinate system NZGD2000 that accounts for both tectonic drift and one-off Earthquake slip events. The numerical coordinate values stay the same but their mapping to real world positions change over time. Hence the coordinate converter requires date as a parameter: https://www.geodesy.linz.govt.nz/concord/ https://www.geodesy.linz.govt.nz/concord/ https://www.linz.govt.nz/guidance/survey/earthquakes/kaikoura-earthquakes/kaikoura-earthquake-coordinate-update https://www.linz.govt.nz/guidance/survey/earthquakes/kaikour...

dnemmers 1y ago

Video link: https://www.youtube.com/watch?v=dbEYe65eDdw https://www.youtube.com/watch?v=dbEYe65eDdw

gnabgib 1y ago
No, this is original the video: https://www.youtube.com/watch?v=77ubC4bcgRM https://www.youtube.com/watch?v=77ubC4bcgRM 2 months ago - https://news.ycombinator.com/item?id=43974910 https://news.ycombinator.com/item?id=43974910
- deleted 1y ago
  [deleted]
- frauhaus 1y ago
  And here’s the paper: https://pubs.geoscienceworld.org/ssa/tsr/article/5/3/281/659624/Curved-Fault-Slip-Captured-by-CCTV-Video-During https://pubs.geoscienceworld.org/ssa/tsr/article/5/3/281/659...
  - deleted 1y ago
    [deleted]

bthallplz 1y ago

I'm amazed to learn that we hadn't had video like this before, but it had to come about sometime!

dylan604 1y ago
The most active faults are not conducive to placing of video cameras. They could have been watching the San Andreas for years, but nothing much happens like this. Also, was this a known fault? Seems like a bad location to build anything if it was known.
- AlotOfReading 1y ago
  Essentially all of myanmar is an active fault zone because it's sandwiched between 4 plates. The narrow cracks we see on the surface are just where the soil happened to separate this one time, not the only place movement can happen.

senectus1 1y ago

incredible footage. just mind bolggling to consider the energy involved here.

litia_shi 1y ago

This footage is incredible and invaluable for science. It really puts into perspective how much energy is released during an earthquake.

BrenBarn 1y ago

Although the pole mentioned in the video is interesting, for me the more prominent visual signal of the motion is another pole right near the center of the view. It starts out visible within the frame of the arch, near its right side. When the quake hits, this pole moves so far to the right that it's almost totally obscured behind the wall of the arch, and it can be seen swaying back and forth. Also, there is a pylon on the far right of the scene that seems to partially collapse. It's cool that we have this video, but sobering to remember that thousands of people died in this quake.

barbazoo 1y ago

Truly groundbreaking stuff.

interloxia 1y ago

Shawn Willsey, Geology Explained, has an 11min summary. https://www.youtube.com/watch?v=CfKFK4-HNmk https://www.youtube.com/watch?v=CfKFK4-HNmk