LARSE '94 LAND EXPLOSION SURVEY

In October of 1994, the U.S. Geological Survey (USGS) and the Southern California Earthquake Center (SCEC) conducted Phase II of the LARSE. This consisted of setting off 63 explosions, from 10 to 4000 lbs., along a line extending 160 km from Seal Beach into the central Mojave Desert. These explosions were recorded by 630 seismographs. Through the northern Los Angeles basin and the San Gabriel Mountains, shots were spaced 1000 m apart and the seismographs 100 m apart in order to produce both a reflection and refraction image of the crust. North and south of this dense segment, seismographs and shots were spaced more widely to produce a wide-angle reflection and refraction image of the middle and lower crust.

REFERENCE

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LARSE '94 MARINE-MARINE
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LARSE '93