Experts: There are many strong earthquakes above level 7 or above in the Fresh Water River Fracture Belt.

Jimu Journalist Ding Wei

Video editing Ding Wei

China Earthquake Network officially measured: At 12:52 on September 5, 2022, a magnitude 6.8 earthquake occurred in Luding County, Ganzi Prefecture, Sichuan (29.59 degrees north latitude, 102.08 degrees east longitude), and the depth of the earthquake was 16 kilometers. Chengdu City has a clear sense of earthquake, and Ganzi, Aba, Liangshan, Ya'an and other places have a sense.

The comprehensive analysis of earthquake experts believes that the earthquake is located near the southern section of the Xianshui River Fracture Band of the South East Section. The possibility of a larger earthquake is not high, and the aftershocks will continue for a period of time.

Earthquake is located in the Fresh Water River Fracture Belt (Picture Source: Sichuan Earthquake Administration)

On September 6, a number of industry experts told Jimu Journalists that in history, the Fresh Water River Fracture Belt has occurred more than 7 more earthquakes. It has nothing to do.

Fresh water rivers break zone has occurred more than 7 earthquakes above 7 times

Sichuan is a strong earthquake province. According to the Sichuan earthquake catalog, from 26 BC to the end of 2021, a total of 309 seismic seismic occurred in Sichuan Province (including the aftershocks of the Wenchuan earthquake), of which 60-6.9 earthquakes were 60 times, and a magnitude 7.0-7.9 earthquake 21 times. A magnitude 8.0-8.9 earthquake once.

Sichuan level 5 earthquakes distributed maps (26 BC to 2021) (picture source: Sichuan Earthquake Administration)

One of the significant features of the Sichuan earthquake activity is the weakness of the western strengths and east, which is generally consistent with the low and east of the Sichuan terrain. There are many earthquake bands in Sichuan Province. Among them, there are three main earthquake belts, namely Songpan, Longmen Mountain Earthquake Belt and the Earthquake Belt of the Flower River, and the Anning River -Corma River Earthquake Belt.

Wang Yan, director of the Chengdu High -tech Research Institute, introduced that on September 5th, a magnitude 6.8 earthquake occurred in Luding in Sichuan on September 5 will be near the intersection point of the three major earthquake bands.

At 12:52 on September 5th, a magnitude 6.8 earthquake occurred in Luding County, Ganzi Prefecture, Sichuan (29.59 degrees north latitude, 102.08 degrees east longitude). The comprehensive analysis of the earthquake experts believed that the earthquake was located in the southern section of the Xianshui River Fracture Belt. nearby.

It is understood that the Fresh Water River Fracture Bands from Ganzi in the north, the Tianwan area in the asbestos in the south, the Chinese classics Zhuyu, Flame, Daofu, Qianning, Kangding, and finally with the Anning River Fracture Belt near Luding River The total length is about 400 kilometers, and it is roughly northwest -southeast.

According to the official website of the Sichuan Earthquake Administration, the Earthquake Band of the Fresh Water River is a zone area with a strong distribution of earthquakes above the freshwater river at the junction of the Sichuan -Yunnan block and the Bayankara block. From 1700 to 2021, the earthquake zone recorded 53 times 5.0 or more earthquake records, of which 6.0-6.9 earthquakes were 14 times; magnitude 7.0-7.9 earthquakes 8 times.

Earlier, some scholars have found the following three characteristics through many strong earthquake studies in the history of the Fresh Water River Fracture Belt: the distribution of the broken zone earthquake:

First of all, the Xianshui River Earthquake Belt is a high -intensity zone of the Sichuan earthquake. According to the Sichuan strong earthquake statistics in the first and second volumes of the "Sichuan Earthquake Information", from 26 BC to 1981, a total of 2.74 earthquakes above the province in Sichuan Province, of which the Xianshuihe Fracture Belt occurred 70 times, accounting for 25.5 % of the province's earthquake. During the same period, a total of 16 times above the province of Sichuan Province had a total of 7.0 or above, of which 8 times occurred in the Xianshui River Fracture Belt, accounting for 50 % of the province's strong earthquakes.

Secondly, the earthquake activity on the Fresh Water River Fracture Belt is uneven on the entire earthquake zone. The Earthquake Belt of the Xianshui River is "dumbbells" in the middle section. The northern section of Ganzi Huo Huo and South Duan Kangding and Luding are deeper. The strong earthquakes above level 7 are located in the two sections of the north and south. From the perspective of earthquake activity, the northern section is slightly higher than the southern section. In the middle of Daofu's fine neck strands, the earthquake activity is lower than the two sections of the north and south, which is a transition zone.

In addition, a strong earthquake jumping in the middle of the fracture belt is a significant feature of the Fresh Water River Fracture Band Earthquake. "According to this characteristic, the geographical location of the future earthquake zone should be moved south to Kangding and Luding, which should attract great attention from the local economic development and urban construction departments." The scholar said in his works. The Luding 6.8 earthquake is not the aftershock of the Wenchuan earthquake

At 12:52 on September 5th, a magnitude 6.8 earthquake occurred in Luding County, Ganzi Prefecture, Sichuan (29.59 degrees north latitude, 102.08 degrees east longitude). The comprehensive analysis of the earthquake experts believed that the earthquake was located in the southern section of the Xianshui River Fracture Belt. Nearby, the main earthquake -aftershock type earthquake. According to the regional structure, historical earthquake activities, and seismic sequence types, the possibility of larger earthquakes in the original earthquake area in the near future, and the aftershocks will continue for a period of time.

On the afternoon of the 6th, Ji Mu Journalist contacted Gong Yu, a first -level investigator of the Sichuan Earthquake Administration (Emergency Service Office). According to him, the type of seismic types mainly have the following types, which are the front earthquake -main earthquake - Yumaging type, main shake -aftershock type, double shock type, shock group type and isolated type. As far as our country is concerned, the most common is the main earthquake -aftershock type earthquake. The characteristics of this type of earthquake are that the main earthquake occurs first. Then follow a series of aftershocks, and the magnitude of the aftershocks are smaller than the main earthquake.

"This earthquake is not the aftershocks of the Wenchuan earthquake. From the perspective of earthquakes, we will think that this earthquake is a new earthquake incident." Gong Yu explained that it has a clear definition of the aftershocks academic, and this time The designated 6.8 earthquake does not conform to the definition of the Wenchuan earthquake.

Earthquake and drought have nothing to do

Some netizens believe that the earthquake of Ganzi Luding in Sichuan is related to the drought this year, and some netizens have the theory of "there must be a big earthquake after the drought" to explain the earthquake.

On September 6, Wang Yan, director of the Chengdu High -tech Disaster Speed ​​Research Institute, told Jimu Journalists that the earthquake has nothing to do with Sichuan's drought this year.

Wang Yan believes that the first so -called "dry earthquake theory" is not scientific. The reason for the theory of drought earthquakes believes that the precursor of the great earthquake is that the friction of the pre -stratigraphy before the large earthquake occurs can lead to fever, which will cause the surface temperature to rise and drought. However, the mismatches of the earthquake occur at about 10 kilometers underground. Even if the heat there is transmitted to the surface, it will take a hundred years or even a thousand years or longer. It is impossible to pass on the ground in a few years. Therefore Droughts and large earthquakes within a few years; in addition, the statistics between the occurrence of the earthquake and the drought are used as the "argument" of the theory of drought, but this is not scientific. The earthquake itself has a certain frequency, and the drought also has a certain frequency. Related two independent events, if you are not serious, you will get a "pseudo -association".

"The occurrence of a large earthquake requires a large earthquake zone. Many places have occurred in many places this year. For example, the United Kingdom in Europe and Hunan and Guizhou Province in my country have no major earthquake bands and no geological conditions for major earthquakes. Before the magnitude 8 earthquake in Wenchuan, Sichuan had no drought in the province. "Wang Yan said.

At the same time, Wang Yan pointed out that long -term droughts have occurred in Sichuan this year. After a long time of high temperature exposure to the surface rocks and soil, the weathering will be relatively serious. Essence

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