A swarm of four small earthquakes struck early this morning just south of San Clemente Island, the southernmost of the Channel Islands, according to data from the U.S. Geological Survey.
The first quake of preliminary magnitude 3.7 struck at 3:22 a.m. It was followed by quakes of magnitudes 3.4 at 3:53 a.m., 2.8 at 3:57 a.m. and 3.3 at 4:53 a.m.
The first, second and fourth quakes were centered roughly 6.2 miles west-southwest of San Clemente Island. The third quake was centered 6.2 miles southwest of the island. The quakes depth ranged from 4.7 miles to 5 miles.
San Clemente Island is owned and operated by the U.S. Navy and is considered part of Los Angeles County.
The Navy uses the island as a firing range for its vessels. According to Wikipedia, it also contains a sonar base and a simulated embassy for commando training.
There is also an airfield on the island.
It is officially uninhabited.
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- This map shows the epicenter of the earthquake near the Channel Islands
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