The Next Big One - slab fragment wedged under Tokyo
Posted by JAC on 3/22/2011, 7:29 am






Ross Stein from the US Geological Survey (USGS) is one of a US/Japanese team that has modelled the region around the triple junction to help gauge future risks.


http://en.wikipedia.org/wiki/Ross_Stein

http://en.wikipedia.org/wiki/Triple_junction

They used seismic signals from 300,000 tremors of various sizes to build a three-dimensional view of what was going on deep in the Earth, much like a doctor might use X-ray tomography to scan tumours in the brain.

They found a 25km-thick fragment broken off one of the plates that they now believe plays a significant role in shaping seismic activity in the Kanto region - and by implication, the outlook for Tokyo.

http://en.wikipedia.org/wiki/Kant%C5%8D_region




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6.6 Aftershock - JAC, 3/22/2011, 5:13 am
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