China News Service, Beijing, September 5 (Reporter Sun Zifa) The reporter learned from the China Earthquake Administration on the 5th that after an earthquake of magnitude 6.8 occurred in Luding County, Ganzi Prefecture, Sichuan Province that day, the China Earthquake Network Center organized experts to investigate the earthquake near Luding County. It is believed that the M6.8 earthquake occurred near the Xianshuihe fault zone, and the preliminary focal mechanism solution shows that it is a strike-slip rupture.

　　Based on the comprehensive consultation of historical earthquakes, earthquake sequence attenuation characteristics and earthquake precursor data, earthquake experts preliminarily judged that it is unlikely that a larger earthquake will occur again in the short term in the original earthquake zone of the Luding M6.8 earthquake in Sichuan, and aftershocks will continue for a period of time.

　　The China Earthquake Administration said that the earthquake department is further closely following the research and judgment.

At 12:52 on September 5, an earthquake of magnitude 6.8 occurred in Luding County, Ganzi Prefecture, Sichuan, with a focal depth of 16 kilometers.

After the earthquake, rocks fell on the section of the Gasyingpan Highway in Lengqi Town, Luding County.

Photo courtesy of Sichuan Forest Fire Protection

　　According to reports, the Xianshuihe fault zone is a large left-lateral strike-slip fault in the eastern part of the Qinghai-Tibet Plateau in China. It is connected with the Anninghe fault in the Kangding area in the south, and the Ganzi-Yushu fault in the Donggu and Ganzi areas in the north. It is the driving force of China. It is one of the fault zones with the strongest deformation in the action environment and crustal movement.

The fault zone has high seismic activity in history, and has experienced many strong earthquakes.

　　Since 1900, a total of 19 earthquakes of magnitude 6 or above have occurred within 200 kilometers of the epicenter of the Luding M6.8 earthquake.

Among them, there were 15 earthquakes of magnitude 6.0-6.9 and 4 earthquakes of magnitude 7.0-7.9. The largest magnitude was the earthquake of magnitude 7.5 in Kangding County, Ganzi Prefecture, Sichuan on April 14, 1955 (about 53 kilometers away from this earthquake). It is the earthquake of magnitude 6.1 in Lushan County, Ya'an City, Sichuan on June 1, 2022 (about 120 kilometers away from this earthquake), and the closest spatial distance is the earthquake of magnitude 6.2 in the northeast of Kowloon, Sichuan on January 15, 1975 (about 32 kilometers away from this earthquake). km).

　　It is also understood that after the earthquake with a magnitude of 6.8 in Luding, Sichuan, the China Earthquake Administration immediately carried out emergency response work.

Min Yiren, Member of the Party Committee of the Emergency Management Department, Secretary of the Party Leadership Group and Director of the China Earthquake Administration, immediately video-connected Sichuan Earthquake Administration, China Earthquake Network Center and other units at the China Earthquake Administration Emergency Command Center, requesting to quickly understand the disaster situation, strengthen earthquake monitoring and Post-earthquake trend research and judgment, timely release of authoritative information, and proactive response to social concerns.

The Sichuan Earthquake Administration, the Yunnan Earthquake Administration, the Chongqing Earthquake Administration, and the Guizhou Earthquake Administration dispatched an on-site working group to the earthquake area quickly to assist in the on-site emergency response.

　　According to the deployment of the Ministry of Emergency Management, Min Yiren led the working group of the Office of the State Council Earthquake Relief Headquarters to rush to the earthquake area to guide the earthquake relief work.

　　According to the China Earthquake Networks, at 12:52 on September 5, Beijing time, an earthquake of magnitude 6.8 occurred in Luding County, Ganzi Prefecture, Sichuan (29.59 degrees north latitude, 102.08 degrees east longitude), with a focal depth of 16 kilometers.

As of 14:00 that day, 3 aftershocks of magnitude 3 or above were recorded, including 2 earthquakes of magnitude 3.0-3.9 and 1 earthquake of magnitude above 4.0, which was an earthquake of magnitude 4.2 at 12:56.

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