The Smartphone App That Tells You An Earthquake Is About to Hit

said braka 9:39 AM
More than 200 people are dead after a

magnitude 7.1 earthquake struck Mexico on Tuesday, the anniversary of the 1985 quake that killed at least 5,000 people. It was the second major earthquake in the region this month. Just 12 days ago, Mexico City’s earthquake-warning sirens blared ahead of an 8.1-magnitude temblor—and many Mexicans reacted as they are by now accustomed to when the alarm went off Tuesday.
The warning system, which has been in place since the early 1990s, is linked to a complementary smartphone app used by millions of Mexicans.
The U.S. Geological Survey said the quake’s epicenter was five miles southeast of Atencingo, in central Puebla state, at a depth of 32 miles. Details of Tuesday’s quake are still emerging, but videos and images posted on social media showedfleeing people, collapsed buildings, and smoke emerging from structures. The mayor of Mexico City, where the quake was also felt, said many people are trapped in the rubble.