A magnitude 4.2 earthquake occurred in Tianning District, Changzhou City, Jiangsu Province last night, and there was a quake in many places in Shanghai. According to the Municipal Earthquake Bureau, after the earthquake, many people went to the square to take refuge but didn't know what to do, and some even wrapped in quilts and dared not go home. In order to deal with the earthquake calmly, we can do a lot of preparations, let’s learn about “how to do it before and after the earthquake”↓
According to , a magnitude 4.2 earthquake occurred in Tianning District, Changzhou City, Jiangsu Province at 21:06 on December 22, with a depth of 10 kilometers.
Expert interpretation
Question
The magnitude of the Changzhou earthquake was magnitude 4.2, but why is the quake more obvious than the magnitude 5.0 earthquake in Dafeng District, Yancheng City, Jiangsu Province on November 17?
Answer
First of all, with People's Square as the center, the last earthquake was 254 kilometers away from People's Square, and this earthquake was 149 kilometers away from People's Square, which was more than 100 kilometers closer.
Secondly, because the surface cover layer in East China is relatively thick, the range of the Changzhou earthquake is relatively large. The Yancheng earthquake occurred in the sea, and the range of feeling was relatively small.
Query
The interval between the two earthquakes is only more than a month, and the location where they occur is very close. Do they have any connection?
Answer
There is no necessary connection. The last magnitude 5.0 earthquake in Yancheng occurred at sea, and this time it occurred on land. The two earthquakes belong to different fault zones, with an epicenter spacing of about 225 kilometers.
Query
Is this earthquake the closest to Shanghai?
Answer
is not. The Gaoyou magnitude 4.9 earthquake that occurred on July 20, 2012 is closer to Shanghai, and Shanghai generally feels it. The 4.2-magnitude earthquake in Tianning District, Changzhou City is a relatively large induced earthquake in recent years, with a relatively large sensation range.
Information: Shanghai Earthquake Bureau
Source: Shanghai Release
