Contact: Barbara Wilcox
United States Geological Survey
Caption: Number of earthquakes at least M=5.5 in the eight days preceding and the eight days following the M=8.6 main shock in the East Indian Ocean on April 11, 2012. This graphic accompanies the September 2012 article in Nature by Fred Pollitz et al.
Credit: U.S. Geological Survey
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Related news release: Rare great earthquake in April triggers large aftershocks all over the globe