PORT HUENEME, Calif. (AP) – An earthquake under the ocean gave an early wake-up jolt to some Southern California residents. The magnitude 4 temblor occurred at 2:13 a.m. Thursday near the Channel Islands, west of the Los Angeles region. The U.S. Geological Survey says 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.