Moderate Tremor Felt in Northern California
SAN FRANCISCO (AP) _ A moderate earthquake was felt in a wide area of Northern California late Wednesday afternoon, but there were no reports of damages or injuries.
The temblor had a magnitude estimated at 4.2 on the Richter scale by the University of California at Berkeley Seismographic Stations. Its epicenter was in Pittsburg, about 40 miles northeast of San Francisco.
″You may get a few things knocked off of shelves, but that’s about all that’s going to happen,″ said Berkeley seismologist Robert Uhrhammer.
In northern Utah, a small quake measuring 3.7 on the Richter scale shook the community of Tremonton near the Idaho border Wednesday, but no property damage or injuries were reported.
Telephone interviews indicated the California quake was felt in San Francisco north to Vacaville and as far east as Stockton.
″The whole house seemed like it briefly shifted,″ said Julie Scarpelli, who lives in a house on stilts in the Berkeley hills. ″It seemed like someone took a hammer to the house.″
Only a few calls from concerned residents were received at Vacaville’s police department, said a spokeswoman.
″It was rolling and rolling,″ added Concord police dispatcher Pat Hattwick, who said the department received numerous calls on the quake.
The open-ended Richter scale is a measure of the energy released by an earthquake, as measured by ground motion recorded on a seisomograph.
A quake of 3.5 can cause slight damage in populated areas, while a quake of 6.0 can cause severe damage.