Over 700 earthquakes occurred in the vicinity of Lassen Peak, California, from February 1981 through December 1983. These earthquakes define a broad, northwest-trending seismic zone that extends from the Sierra Nevada through the Lassen Peak area and either terminates or is offset to the northeast about 20 kilometers northwest of Lassen Peak. Approximately 25% of these earthquakes are associated with the geothermal system south of Lassen Peak. Earthquakes in the geothermal area generally occur at depths shallower than 6 kilometers.
Additional publication details
SEISMICITY OF THE LASSEN PEAK AREA, CALIFORNIA: 1981-1983.
Geothermal Resources Council
Davis, CA, USA
Larger Work Title:
Transactions - Geothermal Resources Council
Geothermal Energy: Bet on It! Geothermal Resources Council 1984 Annual Meeting.