More than once! Jiangsu Yancheng Dafeng sea area earthquake again! According to the official measurement of the Jiangsu Seismic Station Network, at 11:18 on December 11, 2021, a 2.6-magnitude earthquake occurred in the sea area of Dafeng District of Yancheng City, Jiangsu Province (latitude 33.51 degrees, longitude 121.14 degrees), with a depth of 10 kilometers. In terms of location, it is almost the same area as the previous magnitude 5 earthquake.
At 13:54 on November 17, 2021, a magnitude 5.1 earthquake occurred in the waters of Dafeng District, Yancheng City, Jiangsu Province (33.50 degrees north latitude, 121.19 degrees east longitude), with a focal depth of 17 kilometers and a epicenter of 46 kilometers from the border of Jiangsu.
According to the official measurement of the China Earthquake Network, the earthquake in the Dafeng Sea area was 5.0 magnitude. What's the situation? There are very few earthquakes in Jiangsu, will it be a precursor to a major earthquake? This has triggered a lot of heated discussions, many netizens also said that endless, and earthquakes, etc., so everyone is still more worried about the occurrence of earthquakes.
A magnitude 2.6 earthquake, what was the impact?
Judging from the intensity of the earthquake, the last magnitude 5 earthquake had no impact or tsunami problem. This 2.6 magnitude earthquake, many people may not feel anything. Indeed, without the relevant earthquake forecasting, many people may not know about the earthquake, and it is not very close to the land area.
In the last 5-magnitude earthquake, residents in many places around Jiangsu said that they felt the earthquake, and some netizens in Hangzhou, Nanjing, Nantong and other places said that they could feel the building shaking, the windows were shaking, and the chandeliers in their homes also showed signs of shaking.
And this 2.6 magnitude earthquake, everyone should not feel anything, so don't worry about any problems. The 2.6 magnitude earthquake may only be an earthquake produced by the normal movement of the earth's crust, which is not a big deal.
According to conventional parlance, if it is a large plate movement, or the Pacific Plate or the Eurasian Plate, the level is generally not too small. So, this 2.6 magnitude earthquake is not a big deal.
From a historical point of view, earthquakes in offshore areas of about magnitude 5 are normal phenomena and will not have too much impact on the country, so everyone does not have to worry too much. However, in order to dispel everyone's ideas, we must also explain whether there is a possibility of a major earthquake in this Jiangsu region, or a precursor to a major earthquake.
There are very few earthquakes in Jiangsu, will it be a precursor to a major earthquake?
China is indeed one of the countries with a slightly larger impact on the seismic belt, and it is located between the two major seismic belts in the world, the Pacific Rim Seismic Belt and the Eurasian Seismic Belt. Jiangsu belongs to the North China Earthquake Zone, one of the five major earthquake zones in China. The North China Earthquake Zone is divided into four seismic belts, namely the Tancheng-Yingkou Seismic Belt, the North China Plain Seismic Belt, the Fenwei Seismic Belt, and the Yinchuan-Hetao Seismic Belt.
Among them, Jiangsu is located in the Tancheng-Yingkou seismic belt area, and from the situation in the past five years, Jiangsu has had 9 earthquakes of magnitude 3 or above, including 8 earthquakes of magnitude 3.0 to 3.9, 0 times of magnitude 4.0 to 4.9, 1 time of magnitude 5.0 to 5.9, and 0 times of magnitude 6.0 or above, and the largest earthquake is a 5.0 magnitude earthquake that occurred on November 17, 2021 in the sea area of Dafeng District, Yancheng City, Jiangsu Province.
This time, a 2.6-magnitude earthquake occurred in the waters of Dafeng District, Yancheng City, Jiangsu Province, and the Yellow Sea areas to which it belonged did have major earthquakes, such as in May 1984, there were earthquakes of magnitude 6 or more in the Yellow Sea areas, and on January 12, 2011, there was a 5.0-magnitude earthquake in the South Yellow Sea, with a depth of 10 kilometers, and at that time, Shanghai, Ningbo and other places also had obvious earthquakes. Although the earthquake appeared to have such a strong earthquake, it did not cause a tsunami, because the area where it occurred belonged to the shallow sea and did not have the conditions for a tsunami.
Therefore, in the future, the problem of another earthquake in this area, we do not have to worry, it is unlikely to have any major threat, at least from the historical record data, China's coast has not yet induced a tsunami, does not meet the conditions. On the whole, it is all in the sea area, so the impact on the inland is not large.
After reading the above questions, we can also see that it is a fact that there are very few earthquakes in Jiangsu. If there was an earthquake in November and another earthquake in December, would it be a precursor to a major earthquake? Historically, this is highly unlikely. However, the words can not be full, why? After all, there have been earthquakes of magnitude 6 or above in the Yellow Sea.
However, it is also true that earthquakes cannot be accurately predicted in science. In the world, no country or scientists or scientific teams can accurately predict earthquakes, so this is the problem, you can't say that it happened before, it will happen later, right? This is completely inaccurate. So, will this be a precursor to a major earthquake? It is clear that judgment cannot be made.
The only thing that the scientific community can do for the time being is earthquake early warning, which is to achieve earthquake early warning through seismic wave monitoring after the earthquake occurs. Earthquake warnings are generally issued before the impact of the earthquake occurs. So, a lot of people are saying, this is not an earthquake prediction, but it is not. Early warning is to remind everyone to do a good job of earthquake defense, which is the general situation. Looking at the future, whether the scientific community has any way to achieve accurate earthquake early warning, this can only continue to wait.