In case you missed it, a massive 7.1 magnitude earthquake hit New Zealand back in September of this year. The American Geophysical Union has posted amazing photos of railroad tracks that were severely distorted by the quake.
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Bizarre to say the least. The AGU had this to say:
The second image is particularly interesting. Note how the rails show high levels of deformation whilst the surrounding ground shows comparatively little. Notice also how the big kink on the left side has pushed the ballast aside and into the track side ditch This has happened on the right side too, but to a lesser extent. The right side bend nearest the camera has pushed the ballast towards the camera.
My initial hypothesis here (I am no expert on railway track deformation) … is that the buckling may be the result of compressional deformation across a broad zone. The compression on the very strong railway line was accommodated when a weak point was found, leading to a comparatively rapid deformation to form the main buckle on the left. This then concentrated stress on both sides of the buckle, allowing the other (right side) bends to form.
Get the full story, along with a few extra photos here.