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133

First video of an earthquake fault cracking has revealed another surprise (www.livescience.com)

submitted 6 days ago by throws_lemy@lemmy.nz to c/earthscience@mander.xyz

14 comments fedilink hide all child comments

A first-of-its-kind video showing the ground cracking during a major earthquake is even more remarkable than previously thought. It not only captures a ground motion never caught on video before but also shows the crack curving as it moves.

This curvy movement has been inferred from the geological record and from "slickenlines" — scrape marks on the sides of faults — but it had never been seen in action, geophysicist Jesse Kearse, a postdoctoral researcher currently at Kyoto University in Japan, said in a statement.

"Instead of things moving straight across the video screen, they moved along a curved path that has a convexity downwards, which instantly started bells ringing in my head," Kearse said, "because some of my previous research has been specifically on curvature of fault slip, but from the geological record."

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[–] Bubs@lemmy.zip 31 points 6 days ago (8 children)

The video in question

My stupid brain was focusing on the driveway in front of the camera and was confused at how this video was anything important. Then I finally noticed it behind the fence on the right. It's almost terrifying. The whole ground moves several feet it looks like. Jesus Christ.

[–] Narwhalrus@lemmy.world 4 points 6 days ago* (last edited 5 days ago) (2 children)

Here's an annotated video by one of the Authors of the paper this article references that helped me understand what was going on here.

https://youtu.be/dbEYe65eDdw

[–] snek_boi@lemmy.ml 3 points 6 days ago (1 children)

Maybe it’s just me or maybe you forgot to link the video?

[–] Narwhalrus@lemmy.world 1 points 5 days ago

Nope. I'm just an idiot. Fixed now.

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