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Malawi earthquakes
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Posted by heartland chris on December 08, 2009 at 05:12:14:
There was a M5.8 followed by a M5.9 in northern Malawi, with several M5+s in between. I spent a month in Malawi as a D.E.U student at Paris 6 helping French scientists measure striations on faults (It took me 2 weeks to get the hang of it). The rocks are very old so we tried to measure fault slip on active fault escarpments. We published that the paleo-stress direction was NW-SE minimum stress, and inferred that this represented the modern stress. The 2 larger quakes have focal mechanisms for slightly oblique normal slip with extension (strain) of ENE-WSW. So, does not match. At the time, Malawi was building roads, by hand, but the road connecting the northern part of the country had a long unpaved part, where we got stuck trying to pass a stuck truck or bus. We got pushed out by a bunch of people and our winch and gave some money to one of them to distribute, but he took off running. Chris
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