Mexico City quake: A few seconds' warning can still save lives

时间:2019-04-04 06:10:01166网络整理admin

Joel Alvarez/ZUMA Wire/REX/Shutterstock Last week’s magnitude 7.1 earthquake caught me, and everyone else who lives in Mexico City, by surprise. The problem was that everyone here is accustomed to getting plenty of warning before an earthquake – and this time we didn’t. Since 1993, Mexico City has had a fully operational earthquake early warning system. When a magnitude 8.1 quake struck on 8 September,