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February 16, 2012

Deformation from the El Mayor Cucapah earthquake: our Science paper

On Friday, February 10, the journal Science published our paper on deformation caused by the M7.2 El Mayor-Cucapah (EMC) earthquake of April 4, 2010. The data we present is the first of its kind at this scale and scope: we have both pre-earthquake and post-earthquake high resolution topographic surveys that cover virtually the entire fault rupture, all 120 km of it. We used both to calculate the topographic change resulting from this large temblor, …


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 …