Earthquake Recap: Three Small Quakes Shake Up Santa Clara County

Only three quakes got to shakin' Santa Clara County this week, according to the U.S. Geological Survey website.

A mighty 1.0 quake took place Friday at 9:59 p.m. just three miles southwest of Gilroy.

Earlier that same day, a slightly more furious 1.4 magnitude quake shook up San Martin at 10:20 a.m.

This one's epicenter was five miles northeast of San Martin.

The closest quake to hit near Campbell, Los Gatos and Cupertino was a 1.8 tremor three miles south of Los Altos. This one erupted at 11:50 a.m. Monday.

All of these quakes were relatively shallow in depth. Gilroy's tremor was focused 5.78 miles below the Earth's surface, while San Martin's quake was just over four miles below the ground.

Los Altos' quake came in at a very shallow 0.0 miles below the Earth's surface. According to the USGS, a tremor that registers a depth of zero can mean one of two things.

The quake may have simply been a very shallow event with poor depth resolution or it might not be have been an earthquake at all but rather a quarry blast.

These explosions are picked up by the agency's seismic network and are reviewed by a seismic analyst, at which point they might be re-categorized.