Humans are an unknown in California's new earthquake warning system
Mashable -

When a big earthquake struck Mexico City in September 2017, Allen Husker, a seismologist at the National Autonomous University of Mexico, ducked under his desk. The nearby temblor hit before the school's early warning alarm bells could even start blaring. But almost everyone else ran outside. 

"I was one of the only people left in my office," Husker said. "There was a panic," he added, noting that it's dicey to race down stairs when the world is violently shaking. 

The event illustrates the...

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