Information message about a strong earthquake in Qinghai Province, China, May 21, 2021

An earthquake (devastating at the epicenter on the SHSI-17 scale) with M = 7.5 occurred on May 21, 2021 at 18:04 GMT (21:04 Moscow time) in Qinghai province, China.

Parameters of the earthquake have been determined in the Alert Service (AS) of Information Processing Center (IPC) of Geophysical Survey of RAS in Obninsk with station data obtained from digital and analog seismic stations of Russia, countries of CIS and from abroad. Alert message on this earthquake has been delivered in 10 min after registration to the Ministry of Emergency of the Russian Federation (EMERCOM).

Preliminary processing has been done with data from 13 stations, accurate processing - with data from 54.

The red marker on the map шы the epicenters of еру earthquake, it's origin was in Qinghai Province, China, at a depth of 10 km, 25 km NE of Mado, 377 km SW of Xining and 505 km W-SW of Lanzhou.
Time in origin (GMT) Latitude, degree Longitude, degree Depth, km Stations number Ms/N mb/N I0 (calculated) GAP Center
1 18:04:14.0 34.73 98.31 10.0 54 7.5/42 6.7/36 10.5-11 79 GS RAS(Verified)
Federal research center, Geophysical survey of Russian Academy of Sciences
2 18:04:21.0 34.97 98.24 33.0 13 6.4/11 6.5-7 GS RAS(Preliminary)
Federal research center, Geophysical survey of Russian Academy of Sciences
3 18:04:14.5 34.58 98.36 10.0 532 Mw 7.4 25 CSEM
European - Mediterranean seismological center
4 18:04:13.7 34.59 98.26 10.0 140 Mw 7.3/71 6.5/99 18 NEIC
National Earthquakes Information Center of US Geological Service