The USGS deployed 120 refraction seismometers in Chalfant Valley, just north of Bishop, California, on August 3, 1986 to record aftershocks of the July 12, Ml=6.4 earthquake. This experiment occurred during the return trip from a multi-institutional seismic experiment in Northern Nevada. The primary goal of this experiment was to measure the seismic coda using two cross-arrays. Centered about 4 km east of the main shock, a N-S connection line ties the arrays together, and can be used for crustal modeling of the immediate area. The high quality and dense spacing of the data may also abe suitable for source imaging, and analysis of radiation patterns and the includence of local geology.
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