According to the China Earthquake Network, a magnitude 4.8 earthquake occurred in Wenchuan County (30.97 degrees north latitude, 103.37 degrees east longitude) in Aba Prefecture, Sichuan Province at 23:36 on July 14, 2021, with a focal depth of 15 kilometers.
The reporter learned from the Sichuan Seismological Bureau that since 1970, 120 earthquakes of magnitude 4.0 and above have occurred within 50 kilometers of the epicenter of this 4.8 earthquake (including Wenchuan aftershocks).
Among them, there were 100 earthquakes of magnitude 4.0-4.9, 15 earthquakes of magnitude 5.0-5.9, 4 earthquakes of magnitude 6.0-6.9, and 1 earthquake of magnitude 8.0.
Among these earthquakes, the most recent earthquake was the magnitude 4.0 earthquake in Wenchuan County, Aba Prefecture, Sichuan Province on February 26, 2017, and the magnitude 8.0 earthquake in Wenchuan County, Sichuan Province, on May 12, 2008, was the most recent earthquake.
The Wenchuan magnitude 4.8 earthquake on July 14, 2021 is located in the southern part of the Wenchuan aftershock area, which is an ups and down activity in the Wenchuan aftershock area.
After the earthquake, the China Earthquake Early Warning Network produced earthquake early warning information 5 seconds after the earthquake, and Chengdu City received the early warning information 19 seconds before the earthquake wave arrived.
(Headquarters reporter Yang Ni)