Scientists from Stanford University and the U.S. Geological Survey have begun drilling a hole more than a mile deep on an active part of the San Andreas fault. It´s part of an experiment to better predict earthquakes.
An international team of scientists will place instruments down the hole later this summer to build what would be the first underground earthquake observatory at a seismically active area.
The equipment will be used to monitor an area about 163 miles south of San Jose, where a magnitude-6.0 quake has been expected since 1985.
Meanwhile, scientists will need money for a second drilling. They are asking Congress for $30-million over six years, to extend the hole down another 2.4-miles.