The San Andreas Fault Observatory at Depth (SAFOD) is 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.[1][2] The site consists of a 2.2 km (1.4 miles) pilot hole and a 3.2 km (2 miles) main hole.[3] Drilling operations ceased in 2007. Located near the town of Parkfield, California, the project has installed geophone sensors and GPS clocks in a borehole that cuts directly through the fault.[3] This data, along with samples collected during drilling, could shed new light on geochemical and mechanical properties around the fault zone.
SAFOD is 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 is funded by the National Science Foundation in conjunction with the U.S. Geological Survey and NASA.[4] Data collected at SAFOD are available from The Northern California Earthquake Data Center at U.C. Berkeley and at the IRIS DMC.
^Shiels, Maggie (December 5, 2003). "Project to drill into Earth fault". BBC News. Retrieved September 4, 2018.
^Shwartz, Mark (December 3, 2003). "Stanford, U.S. Geological Survey team up to get inside scoop on quake zone San Andreas Fault Observatory at Depth will permit researchers to collect temblor data 2.4 miles below surface of Earth". Stanford News. Retrieved September 4, 2018.
^ ab"SAFOD (San Andreas Fault Observatory at Depth)". Northern California Earthquake Data Center. Archived from the original on September 5, 2018. Retrieved September 4, 2018.
^"San Andreas Fault Observatory at Depth". U.S. Geological Survey. Retrieved September 4, 2018.
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