The organization serves as the coordinating hub for the multi-state region and as a partnership of organizations to mediate disasters and save lives caused by earthquakes in the central U.S..
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例如,在19世纪,一场大地震改变了密西西比河,一条流经美国中部的大河的流向。
For example, in the 1800s a monstrous earthquake changed the course of the Mississippi River, a large river flowing in the central part of the United States of America.
The problem with quakes in the central or eastern us is two-fold: Seismic waves travel farther in the colder, older crust under that part of the country, so the damage can be more widespread.