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Mexico @cires_ac developed an earthquake warning system after a magnitude 8.2 quake killed more than 9,000 people in 1985. The system faced its most significant test in 2017. The lesson learned? Send a simple message with feasible protective action. ht
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@seanbruna In many ways Mexico City is a perfect storm for earthquakes--sorry to hear your family has experienced its challenges! On the plus side, Mexico has a great earthquake early warning system! https://t.co/5LQG0n3eEx