Thursday, October 27, 2011
One of the basic assumptions of plate tectonics is that the major plates are rigid and that most of the earthquakes on our planet occur at the boundaries between rigid plates. The New Madrid seismic zone (NMSZ), located in the heart of the North American continent (over 2,000 km away from the nearest plate boundary), is a notorious exception to this behavior that has generated large magnitude earthquakes (M>7.0), including a series of earthquakes in 1811-1812. Scientists are currently debating whether the series of catastrophic earthquakes that have been occurring approximately every 500 years in this region will continue to occur.
Dr. Magnani will discuss the existing data, proposed models, and the implications for seismic hazard in the central U.S. The lecture will also present the results of a new study along the Mississippi River suggesting that the NMSZ is not the only fault system that has been active in this region.
Source: http://www.itsatrip.org/events/default.aspx?eventid=18280
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