Swarm Of Quakes Rattle SoCal Awake: Did You Feel Them?

ONTARIO, CA — Southern California residents were rattled awake by a series of earthquakes that shook the Inland Empire area early Wednesday morning.

The first quake, a 3.5 magnitude temblor, struck just after 1 a.m. and was followed by five more quakes in the area, ranging from magnitude 3.7 to 2.1, according to the U.S. Geological Survey

The initial quake struck at 1:02 a.m. about 4.6 miles southeast of Ontario at a depth of roughly four miles, according to the U.S. Geological Survey's event report. A minute later, a magnitude 3.2 quake struck around the same area.

A third quake struck the same area about 12 minutes after the first quake. It also registered as a 3.5 magnitude and was 4.4 miles southeast of Ontario at roughly the same depth as the first, USGS reported.

The fourth and strongest of the Wednesday morning quakes shook the Lytle Creek area further to the north at 2 a.m. The temblor registered as a 3.7 magnitude quake with a depth of more than six miles, according to the USGS.

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A smaller 2.1 magnitude earthquake hit the same area roughly 11 minutes later, with another 2.5 magnitude tremor striking at 5:25 a.m.

Wednesday's series of quakes follows a 3.5 magnitude earthquake that struck the Rialto area around 4:55 p.m. Tuesday.

Scientists are monitoring another swarm of quakes this week inland of San Diego.

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