The quake was reported around 8:40 a.m. and centered about 18 miles northeast of Las Brisas, which is about 135 miles southeast of San Diego.
The earthquake had a recorded depth of 12 miles, according to USGS.
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No tsunami warnings or advisories have been issued by the National Oceanic and Atmospheric Administration at this time.
It's unclear if any damages or injuries have been reported at this time.