"The US Geological Survey's automated earthquake detection system can occasionally produce erroneous readings due to signal interference or processing errors, but these instances are reportedly supposed to be rare."
"In early December, Bay Area residents were alarmed by an 8:06 am 'Critical' earthquake warning about a 5.9M quake, which was centered in Lyon County, Nevada, over 200 miles away."
Northern California experienced multiple false earthquake alerts, with no loud alarms disturbing residents. The US Geological Survey is investigating the erroneous alerts triggered by its automated detection system. These alerts included reports of offshore earthquakes and other locations, but no actual quakes were confirmed. The system can produce false readings due to signal interference or processing errors, which are supposed to be rare. A previous false alarm in December also caused alarm among residents, leading to a retraction and apology from the USGS.
Read at sfist.com
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