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2004 M4.5 North of Lake Tahoe

The Lake Tahoe/Reno area was shaken by a light earthquake at 1:54 AM PDT on Thursday, June 3rd. The magnitude 4.5 (ML) earthquake was located less than a kilometer from the California/Nevada border, 10 km N of Kings Beach, CA, and 11 km NNW of Incline Village, NV.

According to the Nevada Seismological Laboratory, the M4.5 was preceeded by five minor foreshocks. The largest of these occurred at 1:25 AM with magnitude 3.0. A number of small aftershocks have been recorded.

The moment tensor solution for this event shows a normal mechanism, with Mw 4.2. The earthquake was felt as light to weak shaking throughout the Reno and Lake Tahoe region. The inital ShakeMap computed by the CISN contained a limited amount of data; the maps were updated at noon on June 4th with the addition of strong-motion data recorded by Nevada Seismological Laboratory. The addition of these data, mostly from stations in the Reno and Carson City area, provide important constraints on the map to the north and east.

Map showing the location of the M4.5 and several small aftershocks as of 6/4/2004 at 3:00 PM PDT.

More information:

CISN Northern California Management Center and the Nevada Seismological Laboratory

California Integrated Seismic Network

CGS USGS OES Caltech UC Berkeley