A loud noise was heard across San Diego County Tuesday evening, but it was unclear what caused the boom.
It occurred around 8:15 p.m. and residents, including San Diego Mayor Todd Gloria, took to social media to report hearing the boom.
"Yes, I heard it," Gloria wrote on Twitter. "No, I don't know what it was. I'll share if I get any information."
RELATED: Did You Feel ‘It?’ Not An Earthquake, But Possibly Sonic Boom
Yes, I heard it.
— Todd Gloria (@ToddGloria) June 9, 2021
No, I don’t know what it was.
I’ll share if I get any information.
Get vaccinated if you haven’t yet.#SanDiegoBoom
There were no reports of an earthquake occurring in the region at that time, according to the U.S. Geological Survey.
Camp Pendleton posted on its Facebook page June 3 that artillery units were scheduled to conduct live-fire training from Saturday through Friday and explosive munitions fire was expected between 6 a.m. and midnight each day.
