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Magnitude 6.6 - CENTRAL CALIFORNIA

2003 December 22 19:15:56 UTC

Preliminary Earthquake Report

Small Globe

Magnitude 6.6
Date-Time Monday, December 22, 2003 at 19:15:56 (UTC)
= Coordinated Universal Time
Monday, December 22, 2003 at 11:15:56 AM
= local time at epicenter
Location 35.706°N, 121.102°W
Depth 7.6 km (4.7 miles)
Region CENTRAL CALIFORNIA
Distances 11 km (6 miles) NE (49°) from San Simeon, CA
17 km (10 miles) N (356°) from Cambria, CA
20 km (13 miles) W (260°) from Lake Nacimiento, CA
39 km (24 miles) WNW (283°) from Paso Robles, CA
195 km (121 miles) SSE (158°) from San Jose City Hall, CA
Location Uncertainty horizontal +/- 0.2 km (0.1 miles); depth +/- 0.8 km (0.5 miles)
Parameters Nst= 46, Nph= 46, Dmin=5.4 km, Rmss=0.05 sec, Gp= 83°,
M-type=regional moment magnitude (Mw), Version=3
Source U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Event ID nc40148755
Felt Reports Two people killed and about 40 buildings collapsed or severely damaged at Paso Robles.At least 40 people injured in the Paso Robles-Templeton area. Buildings damaged and small firesoccurred at Cambria and Morro Bay. The airport at Oceano was closed due to cracks in the runway.More than 10,000 homes and businesses were without power in the Paso Robles area. Felt (VII) atAtascadero, Bradley, Cambria, Cayucos, Creston, Lockwood, Los Osos, Morro Bay, Nipomo, Oceano, PasoRobles, San Miguel, San Simeon, Shandon and Templeton; (VI) at Arroyo Grande, Beverly Hills, GroverBeach, Guadalupe, Pismo Beach, San Luis Obispo, Santa Margarita and Santa Maria; (V) at Avenal,Danville, Filmore, Inglewood, King City, Lompoc, Santa Inez, Santa Monica, Solvang, Taft and Wasco;(IV) throughout west-central California; (III) from San Francisco and Santa Rosa to Los Angeles andOceanside. Felt in much of central California and at Bullhead City, Arizona.


Preliminary Earthquake Report
USGS, Menlo Park, CA
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory,
Berkeley, California