According to the official determination of the China Seismological Network, a magnitude 4.3 earthquake occurred at 18:31 on February 12 in Yongqing County, Langfang City, Hebei Province (39.37 degrees north latitude, 116.67 degrees east longitude).
According to the China Earthquake Network Center, the earthquake may be isolated, and it is unlikely that a larger earthquake will occur in the original earthquake zone. In addition, it is unlikely that a magnitude 5 earthquake will occur in the Capital Circle.
This is an isolated earthquake
According to the official determination of the China Seismological Network, the magnitude of the magnitude 4.3 earthquake occurred at a height of 20 km. As of 20:00 on the 12th, a total of 11 aftershocks of magnitude 0 and above were recorded, with a maximum aftershock of 1.8.
After the earthquake, many false news about the earthquake spread on the Internet. One of them mentioned, 'The aftershocks will continue to increase, and the predicted epicenter high peak will reach 6.8 or so. The time is predicted to be between 2 am and 4 am. Hope the source center Residents nearby evacuate urgently ' .
In this regard, the official microblog of the Beijing Earthquake Administration has rumored, and said that the type of vertical earthquakes that occurred around the earthquake were mostly isolated earthquakes. The earthquake is more likely to be isolated.
According to the official Weibo of the Langfang Municipal Government Press Office, the news of the Yongqing County 9958 Emergency Rescue Team received a notice, the news of the Yu Zhen activity at 11:30 tonight is purely a rumor, the public security department is tracking the source of the rumor, please The masses should not believe in rumors, subject to the official announcement of the government.
Agents also learned from the China Seismological Network Center that after the analysis and judgment, the earthquake was isolated, and it is unlikely that a larger earthquake will occur in the original earthquake zone. In addition, it is unlikely that a magnitude 5 earthquake will occur in the Capital Circle.
According to reports, isolated earthquakes are ex-earthquakes, and aftershocks are rare and have a very large earthquake sequence with the magnitude of the main shock. The seismic energy of the entire sequence is basically released by the main shock once.
No casualty report has been received yet
On the evening of the 12th, the quarantine team learned from the Yongqing County Government Office that the local government has not received any casualties or disaster reports. A staff member of the Yongqing County Government Office introduced that due to the short time of the earthquake, they are paying close attention to it. According to the China Seismological Network, the villages within 5 km of the earthquake include Xinwu Village, Xiaozhan Village, Zuoyu Village, Jiaozhuang Village, North Liuzhuang Village, and Dongxiu Village. , Xixi Village, Beijiao Village, Dazhan Village, Hengting Village; within 20 km of township, there are Bieguzhuang Town, Hancun Town, Tiaotou Township, Qiuzhuang Township, Dock Town, Caojiawu Township, Yang Tax Township, Ge Yu Town, Liyu Town. Yongqing County Government Office staff said that the staff of the County Seismological Bureau was rushing to the scene to understand the situation.
In addition, the local area is conducting a comprehensive investigation of the county's earthquake situation, focusing on the investigation of the elderly, five-guarantee households and other vulnerable groups, as well as rural dangerous houses. After investigation, as of 21:00 on the 12th, the county has no casualties and property losses.
Beijing has a distinct sense of earthquake at around 18:31. The Xiaozhao (a pseudonym) WeChat group, which is working in Beijing, was detonated by the same message, 'feeling good,' 'is it earthquake', etc. At the same time, being in Liujiayao Nearby, he also felt the whole building swaying, and got up and ready to leave. Friends circle also poured in dozens of news, citizens of different coordinates shared their feelings, and some even ran downstairs. According to the official microblog of the Beijing Earthquake Administration, The Beijing area was affected by the earthquake. The instrument recorded a maximum intensity of 4 degrees. The location was in Tongjia Township, Tongzhou District, and most of the other areas were 2 to 3 degrees. The monitoring instrument recorded the earthquake and the public feedback was basically the same. In addition, according to the Municipal Seismological Bureau, All administrative districts in Beijing have obvious earthquakes, but the duration of the sloshing is short, only about 2 seconds. The Beijing Earthquake Administration has sent two teams of on-site teams to the epicenter to verify the earthquake. According to the analysis of the current monitoring data, no earthquake anomalies have been found. .
Dispel doubt
Why is Beijing obviously shocked?
The earthquake occurred in Yongqing County, Langfang City, Hebei Province. Why did Beijing citizens have a strong sense of shock? Sun Shihong, a researcher at the China Seismological Network Center, explained that the degree of damage caused by the earthquake is related to the intensity of the earthquake. It can reflect the extent of damage to the surface after the earthquake. The higher the intensity. According to the news released by the China Seismological Network, the epicenter is densely populated and has a large sense of influence. The epicenter is about 65 kilometers away from the Beijing urban area. In addition, according to the Municipal Seismological Bureau, the Beijing area instrument Recording intensity is up to 4 degrees, the location is in Tongjia Township, Tongzhou District, and most of the other areas are 2 to 3 degrees. Sun Shihong, a researcher at China Earthquake Network Center, explained that if the intensity is 3 to 4 degrees, most people in the room will feel, outdoor At the same time, the magnitude of the earthquake is also related to the depth of the source. 'The focal depth of the earthquake is 20 kilometers, the seismic wave spreads more widely, and the peripheral area has a larger range.' In addition, if the public is in a tall building, The high level will also amplify this kind of shock to a certain extent.
influences
Beijing-Shanghai high-speed rail, Beijing-Shanghai, Beijing-Kowloon line short-term outage inspection on the 12th at 21:03, the agent learned from the China Railway Beijing Bureau Group that the Beijing-Shanghai high-speed rail, Beijing-Shanghai, Beijing-Kowloon line affected by the Langfang earthquake returned to normal According to statistics, due to the large number of trains affected by the Langfang earthquake during the Spring Festival, at least K285, T124, T231, Z9, Z17, Z51, Z65, Z67, Z71, Z107, Z133, G18, G333, G1567, G4961, G509, etc.
Some passengers reported that the emergency stop time of the train caused by the line maintenance was more than 2 hours, and the short time was a few minutes. The Beijing Railway official Weibo released a message saying, 'After the earthquake, to ensure the safety of passenger trains, the China Railway Beijing Bureau Group immediately The contingency plan was launched, and the Beijing-Shanghai high-speed railway was stopped by the stoppage. The Beijing-Shanghai and Beijing-Kowloon lines passed the passenger trains of the section. The officers were organized to inspect the lines, causing some passenger trains to be late. ' (Beijing News)
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24 aftershocks occurred after the Yongqing earthquake. Earthquake experts: no damage
The 4.3-magnitude earthquake in Yongqing, Hebei Province, with a focal depth of 20 km. Langfang City, Hebei Province, Beijing, Tianjin, Tangshan City, Hebei Province, Zhangzhou City, Chengde City, Hengshui City, Baoding City and other places have different intensity earthquakes. Liu Guiping, deputy director of the Network Center, researcher told the Voice of China reporter that the earthquake should be said to be a moderate earthquake, but such an earthquake will not cause damage.
The effect is that there is a sense of earthquake. Because of its deep depth, the range of the earthquake is relatively large. There are some slight earthquakes in some areas of Beijing. But such an earthquake will not cause damage. Such an intensity will not cause the building. Destruction. The earthquake occurred on a fault in the Xihe River in Hebei. The scale of this fault is relatively small. According to our previous experience, the possibility of a strong earthquake is very small.
According to reports, after the 4.3-magnitude earthquake in Yongqing, Hebei Province, as of 9:20 pm on the 12th, 24 aftershocks were recorded, with a maximum aftershock of 1.8.
Since 1900, no earthquake of magnitude 5 or above has been recorded within 50 km of the epicenter. The most recent magnitude 5 earthquake was a 5.1-magnitude earthquake that occurred in Wen'an, Hebei on July 4, 2006. 60km. Since 1970, the earthquakes within 50km of the epicenter have been isolated, that is, the magnitude of the aftershocks is significantly lower than the magnitude of the main shock. Liu Guiping told the Voice of China reporter that a larger earthquake occurred in the earthquake-prone area of the 4.3-magnitude earthquake in Yongqing, Hebei Province. May not be big:
The earthquake occurred in the area bordering Hebei and Tianjin. The earthquake should be said to be the ups and downs of a relatively normal earthquake activity in this area. The meeting believes that the earthquake is highly likely to be an isolated earthquake, Hebei Yongqing 4.3. It may not be possible to have a larger earthquake in the area of the earthquake. However, there may be some aftershocks that cause some slight earthquakes.
After the earthquake, the China Earthquake Administration decided to launch a four-level emergency response. Langfang City, Hebei Province and surrounding cities (districts), the county earthquake department quickly dispatched personnel to carry out disaster investigation and on-site emergency work.
