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

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Why the North Rim earthquake is important

It was only a magnitude 3.5 earthquake that struck the unpopulated North Rim of Grand Canyon early on Sunday morning, but it is evidence of a major issue in assessing seismic hazards in Arizona.  We have had a statewide seismic monitoring network for only the past few years.  We think we can detect all magnitude 3 earthquakes and most magnitude 2.5 events anywhere in the state for the first time | Impressum