San Andreas Fault Observatory at Depth

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The San Andreas Fault Observatory at Depth (SAFOD) was a research project that began in 2002 aimed at collecting geological data about the San Andreas Fault for the purpose of predicting and analyzing future earthquakes.<ref name="bbc20031205">Template:Cite news</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The site consists of a Template:Convert pilot hole and a Template:Convert main hole.<ref name="quake.berk">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Drilling operations ceased in 2007. Located near the town of Parkfield, California, the project installed geophone sensors and GPS clocks in a borehole that cut directly through the fault.<ref name="quake.berk" /> This data, along with samples collected during drilling, helped shed new light on geochemical and mechanical properties around the fault zone.

SAFOD was part of Earthscope, an Earth science program using geological and geophysical techniques to explore the structure of the North American continent and to understand the origin of earthquakes and volcanoes. Earthscope was funded by the National Science Foundation in conjunction with the U.S. Geological Survey and NASA.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Data collected at SAFOD are available from The Northern California Earthquake Data Center at U.C. Berkeley and from NSF SAGE Facility Data Services operated by EarthScope Consortium, formerly known as the IRIS DMC.

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