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November 21, 2012
Amazing liquefaction in Tokyo
A new video from Japan [embedded below] shows liquefaction occurring at a scale and scope that I haven’t seen before in video footage. The video is from Urayasu town, Chiba Prefecture–an industrial suburb of Tokyo that appears to be sited on made land adjacent to Tokyo Bay. No wonder it sloshes so heavily: made land (fill) is particularly susceptible to liquefaction. We just can’t pack things down the way nature can …
June 15, 2011
More quake footage from NZ
Yesterday I posted a few videos of the large pair of quakes that struck Christchurch once again on Monday. Since then a few more have surfaced showing the 6.0 as it happened. Clearly even the earthquake-worn residents of Christchurch were startled by such a large temblor. This man’s home suffered some damage in the 5.5 earlier, so he set up a camera while he went about his business. Sure enough …
March 11, 2011
Liquefaction in an aftershock
I stumbled upon a fascinating video a couple of weeks ago showing what happens to sand volcanoes as seismic waves pass. This would have fit in either my aftershocks or my liquefaction posts from last week, but it’s both stunning and unique so I decided it deserves a post of its own. http://www.youtube.com/watch?v=Nv–8ybjnwk This New Zealand man is filming sand blows forming from liquefaction of a school yard in …
March 4, 2011
Liquefaction in New Zealand
One of the ubiquitous features of the nice flat sedimentary plains where people tend to prefer building cities, suburbs, or at least vast agricultural tracts, is that they generally liquefy when subjected to strong shaking. The results include serious instability of the “solid” ground, flooding, and ejection of silty water in places it would certainly be best not to have water being ejected. Here’s an example from Christchurch Here’s a …
