Saturday, April 25, 2015

Accumulating a few links on the April 25, 2015 M7.9 Nepal Earthquake

An M7.8 earthquake occurred 77km (48mi) NW of Kathmandu, Nepal April 25, 2015. It apparently occurred along the Main Himalayan thrust fault system which accommodates the substantial convergence between India and Eurasia. The last great earthquake in this region along the Himalayan arc was about 240 km southeast--the 1934 M8 1934 Nepal-Bihar earthquake--and caused major damage to Kathmandu and about 10,600 casualties. This 2015 earthquake is likely to have been devastating. More than 3.6 million people are expected to have felt very strong shaking.

May 12, 2015: a large aftershock occurred on the eastern end of the April 25, 2015 rupture zone: USGS summary

See this Jonathan Amos/BBC explainer on Why Nepal is so vulnerable to quakes. And, here is a blog entry from NY Times on Himalayan seismic risk. Here is the anticipation of damage and casualties from USGS Pager.

The focal mechanism, inverted finite fault, and the aftershocks are consistent with the interpretation of the event along the Himalayan Thrust system.

Here are some links I am accumulating:


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