An earthquake under the ocean gave an early wake-up jolt to some Southern California residents Thursday morning, U.S. Geological Survey confirmed.
The magnitude 4 temblor occurred at 2:13 a.m. near the Channel Islands, west of the Los Angeles region.
The U.S. Geological Survey said the quake was centered about 15 miles south of Port Hueneme and occurred at a depth of 6 miles.
The USGS citizen reporting website received about 1,500 responses mostly describing the shaking as light or weak.
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