3.7-magnitude earthquake shakes Santa Clara County

The nearly 4-mile deep quake hit about 6 miles from San Martin at 5:58 a.m. Monday, according to the USGS.|

A 3.7-magnitude earthquake shook the Santa Clara County area in California, the U.S. Geological Survey reported.

The nearly 4-mile deep quake hit about 5 1/2 miles from San Martin at 5:58 a.m. Monday, according to the USGS.

More than 200 people from as far away as Santa Rosa and Hollister reported feeling the shake, according to the agency.

Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says. It replaces the old Richter scale.

Quakes between 2.5 and 5.4 magnitude are often felt but rarely cause much damage, according to Michigan Tech. Quakes below 2.5 magnitude are seldom felt by most people.

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