China News Network, Chengdu, July 12 (Yang Yumin) The Chengdu High-tech Disaster Reduction Institute (hereinafter referred to as the "Disaster Reduction Office") announced on the 12th that the Continental Earthquake Early Warning Network jointly established by the Disaster Reduction Office and the emergency management department has successfully warned on the 12th 6 At 38 o'clock, a magnitude 5.1 earthquake occurred in Guye District, Tangshan City, Hebei Province, giving Tangshan City a 3-second early warning and Tianjin City a 33-second early warning.
It is reported that this earthquake is the 57th devastating earthquake that has been successfully and successfully warned by the China Earthquake Early Warning Network since 2011. Users of mobile phones, TVs, Internet TVs, and mobile APPs that have earthquake warning functions in the vicinity of the epicenter have received earthquake warning information in advance, and some people in Beijing and Tianjin received the warning 30 seconds in advance. The Earthquake Early Warning Network of the People's Republic of China released earthquake warning information through nearly 50 government affairs and media microblogs for the first time. It also provided warning information for the China Earthquake Network Center, the National Early Warning Information Release Center, the National Disaster Reduction Center, and the Sichuan Emergency Management Department. .
Mobile phone users near the epicenter received an earthquake warning. (Photo courtesy of Chengdu Hi-tech Disaster Reduction Research Institute)
The China Earthquake Early Warning Network is Tangshan City, 26 kilometers away from the epicenter, with a warning time of 3 seconds, an estimated intensity of 4.2 degrees, and a strong sensation; Qinhuangdao City, 99 kilometers away from the epicenter, with a warning time of 24 seconds, an estimated intensity of 2.5 degrees, and a slight quake ; Tianjin City, 131 kilometers away from the epicenter, has a warning time of 33 seconds, with an estimated intensity of 2.1 degrees, and a slight quake; Chengde City, 143 kilometers away from the epicenter, has an early warning time of 36 seconds, with an estimated intensity of 2.0 degrees, which may have a sensation.
According to the Disaster Reduction Office, the earthquake intensity quick report and population heat map generated by the China Earthquake Early Warning Network showed that the area of 5 degrees and above in this earthquake was about 1952 square kilometers, with a population of about 1.56 million, involving 7 districts. There are 37 townships in the county, of which the area of 6 degrees is about 214 square kilometers, involving 10 townships in 3 districts and counties, with a population of about 490,000. At present, the relevant data has been submitted to the emergency management department to provide reference for emergency rescue decisions.
It is understood that the Disaster Reduction Office and the city and county emergency management departments began to provide earthquake early warning services to the community in 2011. In 2014, they jointly built 31 provinces and municipalities in China, covering an area of 2.2 million square kilometers and covering 90% of the population in the earthquake area of China. (660 million people) China Earthquake Early Warning Network, serving major projects, hazardous enterprises, primary and secondary schools, communities, etc. So far, it has successfully warned of the Lushan 7 earthquake, Ludian 6.5 earthquake, Jiuzhaigou 7 earthquake, and Changning 6.0 earthquake Waiting for 57 devastating earthquakes.
Earthquake early warning is not an earthquake prediction. An earthquake prediction is an early warning of future earthquakes. It is an unsolved scientific and technological problem. The technology of earthquake early warning is mature. It is based on the principle that radio waves are faster than seismic waves. The earthquake early warning network established by using seismic sensors and related technical systems can automatically advance a few seconds to tens of seconds in the target area when a destructive earthquake occurs. The behavior of issuing warnings to users who have not yet been affected can reduce casualties and secondary disasters. (Finish)