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by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

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Big increase in Arizona seismicity in 2011

In 2011, there were 131 earthquakes detected by instruments in Arizona. The largest events of the year were magnitude (Md) 3.7 and 3.6 near Clarkdale in central Arizona, according to a summary compiled by AZGS seismologist Lisa Linville, and published today in our online magazine, Arizona Geology.In 2010, there were 53 earthquakes recorded. Overall, seismic activity in 2011 represents a 160%

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