News, Bay Area earthquake came with early warning for 2.1 million ShakeAlert app users : detailed suggestions and opinions about Bay Area earthquake came with early warning for 2.1 million ShakeAlert app users .
Many San Francisco Bay Area residents were given several seconds’ warning before the shaking arrived from a magnitude 5.1 earthquake that struck under the mountains east of San Jose this week.
The activation of the U.S. Geological Survey’s ShakeAlert system is the second time in six weeks that Bay Area residents got a warning before they felt shaking. Tuesday’s magnitude 5.1 earthquake was the most powerful to hit the Bay Area since the destructive Napa earthquake of 2014, which was magnitude 6.0.
More than 2.1 million earthquake alerts were issued to users Tuesday, said Robert de Groot, part of the ShakeAlert operations team.
According to Gov. Gavin Newsom’s office, most were users of Android smartphones, which has the early-warning alert baked into its operating system. Nearly 100,000 users of the free MyShake app — developed by UC Berkeley and available on iOS and Android systems — also got the warning.
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