Two earthquakes, apparently along the Cascade fault line, shook parts of the Midpeninsula Sunday, the first occurring at 9:28 a.m. and the second at 6:38 p.m. according to the U.S. Geological Survey. Both were centered in Los Altos.
The evening temblor was a 2.4 magnitude, with an epicenter along Altos Oaks Drive. View the map.
Its depth was recorded as 2.1 miles, the USGS reported.
The earlier quake, a 3.1 magnitude, was centered less than 0.3 miles away on Briarwood Court, which is near Springer Road and Foothill Expressway.
The depth of the quake was also 2.1 miles, according to the Geological Survey.
Kathy Hobson, a resident on Briarwood, said nothing was damaged by the quake in her home or on the street.
"It was a loud bang," Hobson said. "My dog came and looked at me and said what's going on? The lights were swinging, but nothing fell off
Another resident on the street, who did not want to be named, said it "sounded like a freight train" when the quake hit.
"It shocked me out of my chair," she said.
In Mountain View, the morning temblor felt like a single jolt, one resident reported.
View the map of the morning quake's epicenter.
Click here for a map containing local fault lines.
The map appears to show the quakes' epicenters falling along the Cascade fault line. However, Leslie Gordon, a USGS spokesperson, said a seismologist Monday is checking the data to determine whether the quakes originated in the Monta Vista fault instead.