Information message about a strong earthquake east of the Kuril Islands on September 20, 2021

An earthquake (significant at the epicenter on the SHSI-17 scale) with M = 5.9 occurred on September 20, 2021 at 20:25 GMT (23:25 Moscow time) in the Pacific Ocean east of the Kuril Islands.

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 4 min after registration to the Ministry of Emergency of the Russian Federation (EMERCOM).

Preliminary processing has been done with data from 11 stations, accurate processing - with data from 63.

The red marker on the map is the epicenter of the earthquake, it's origin was located in the Pacific Ocean east of the Kuril Islands, at a depth of 55 km, 84 km SE of Kitoboynoye, 385 km E-NE of Kurilsk and 548 km SW of Severo-Kurilsk.
Time in origin (GMT) Latitude, degree Longitude, degree Depth, km Stations number Ms/N mb/N I0 (calculated) GAP Center
1 20:25:28.0 46.33 152.56 55.0 63 5.9/37 6.1/28 5.5-6 148 GS RAS(Verified)
Federal research center, Geophysical survey of Russian Academy of Sciences
2 20:25:26.4 46.18 152.82 33.0 11 6.5/9 7-7.5 GS RAS(Preliminary)
Federal research center, Geophysical survey of Russian Academy of Sciences
3 20:25:23.0 46.38 152.43 9.1 391 Mw 6.0 38 CSEM
European - Mediterranean seismological center
4 20:25:25.6 46.41 152.41 25.0 138 Mw 6.0/10 6.1/99 39 NEIC
National Earthquakes Information Center of US Geological Service