San Diego experienced and heard a loud boom.

NEW YORK — Tuesday night, a lot of San Diegans posted on social media inquiring about big bangs they had felt and heard from Kearny Mesa to Mission Valley.

The military was performing a planned training exercise, according to San Diego police, who verified this to FOX 5.

Camp Pendleton tweeted on January 27 that there would be a noise alert because of nighttime live fire training from January 28 to February 5.

Quinton Tarantino said on Twitter, "Anyone in San Diego experiencing these explosion-like sounds? heard as far south as Mission Valley and Kearny Mesa.

Another person reported seeing police sirens and helicopters.

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