"The ShakeAlert computer system that warns about the imminent arrival of shaking from earthquakes sent out a false alarm Thursday morning for a magnitude 5.9 temblor in Carson City, Nev., that did not actually happen. The ShakeAlert blared on both the MyShake app and the Wireless Emergency Alert system - similar to an Amber Alert - on phones across the region, including in the San Francisco Bay Area, the Sacramento area, and in eastern California, just after 8 a.m."
"It wasn't immediately clear why the ShakeAlert system was activated, or how many phones got the incorrect alerts. The earthquake report was later deleted from the MyShake app - which carries earthquake early warnings from the U.S. Geological Survey's ShakeAlert system - and from the USGS earthquake website. "We did not detect any earthquakes," said Paul Caruso, a USGS geophysicist, Thursday morning."
A ShakeAlert false alarm warned of a magnitude 5.9 earthquake in Carson City, Nev., that did not occur. The alert reached phones across the Bay Area, Sacramento and eastern California via Wireless Emergency Alerts and the MyShake app just after 8 a.m. The erroneous report was later deleted from the MyShake app and from the USGS earthquake website. Paul Caruso, a USGS geophysicist, said no earthquakes were detected. Robert de Groot, an operations team leader for ShakeAlert, said the team is investigating the cause. ShakeAlert has provided seconds of warning for real quakes but has misfired previously.
Read at Los Angeles Times
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