“USGS is aware of a letter circulating on the Internet that uses our logo and warns of an impending sizable earthquake in Southern California. USGS had no part in this letter or any alleged alert.

The U.S. Geological Survey issued a warning Monday about a fake letter being circulated in the region with the USGS logo. The letter warned residents of an impending earthquake that could reach a ...

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The agency said the letter used an unofficial USGS logo and was sent to residents. "USGS had no part in this letter or any alleged alert," the agency said on its Facebook page.