China successfully warned of a destructive earthquake for the first time

China successfully warned of a destructive earthquake for the first time At 10:46 local time on the 19th, at the junction of Qiaojia County, Zhaotong City, Yunnan Province, and Ningnan County, Liangshan Yi Autonomous Prefecture, Sichuan Province...

At 10:47:55 on the same day, the earthquake early warning system issued an earthquake early warning countdown alarm through the earthquake early warning information receiving terminal, and displayed the earthquake early warning information "A 5.0-magnitude earthquake occurred in Qiaojia, Yunnan Province at 10:46:59...". The earthquake early warning information was also released simultaneously through mobile phones, computers, special receiving terminals, Weibo, etc. Warning times ranging from a few seconds to tens of seconds are provided for parts of Qiaojia County, Zhaotong City and other surrounding areas.

A few minutes later, the reporter confirmed through information released by the China Seismological Network that a magnitude 4.9 earthquake occurred at the junction of Qiaojia County, Zhaotong City, Yunnan Province, and Ningnan County, Liangshan Yi Autonomous Prefecture, Sichuan Province (27.1 degrees north latitude, 103.0 degrees east longitude) at 10:46 that day. According to relevant departments, so far, the earthquake has caused 4 minor injuries, 9 households with 56 houses collapsed, and 298 households with 815 houses damaged.

It is understood that earthquakes with a magnitude less than 2.5 are usually small earthquakes; earthquakes with a magnitude of 2.5 to 4.7 are felt earthquakes; destructive earthquakes are earthquakes with a magnitude greater than 4.7 and cause certain casualties and building damage, or earthquake disasters that cause major casualties and building damage.

"After this earthquake, it was proved that this system can also handle larger earthquakes." Wang Dun, director of the Chengdu High-tech Disaster Reduction Institute, said that after the earthquake early warning system has experienced many smaller earthquakes, this earthquake confirmed that the earthquake early warning system can also provide good early warning for destructive earthquakes around magnitude 5.