Two loud booms heard in northern San Diego

Camp Pendleton artillery training possible source of sounds

North Coast Current

Residents from coastal San Diego communities such as Encinitas east to San Marcos and elsewhere in the county reported hearing two loud booms around 8:35 p.m. Monday.

In some cases, residents told the North Coast Current they also felt the booms. One San Marcos resident reported that the booms felt like a crash of some kind nearby, although reports of the sounds were coming in from elsewhere in North County as well.

The booms did not appear to have been earthquakes and were likely the result of training exercises at Marine Corps Base Camp Pendleton. Residents reported more booms later in the evening.

A Camp Pendleton noise bulletin released for the week of July 10 listed training involving mortar and artillery fire for Monday, July 12, and throughout the week.

Information from the U.S. Geological Survey and regional seismometer monitors reported no earthquakes larger than a 2.4 as of 8:50 p.m., none of which were near or in San Diego County.

The booms did not appear to have been from thunder as weather radar did not show any summer monsoon-related storm activity in San Diego at the time.

Did you hear or feel the booms this evening? Tweet your information to the North Coast Current @nccurrent.

(Story updated 7/12/2021 at 10:20 p.m.)

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