Information message about a strong earthquake off the coast of Alaska on October 11, 2021.

An earthquake (strong at the epicenter on the SHSI-17 scale) with M = 6.7 occurred on October 11, 2021 at 09:10 GMT (12:00 Moscow time) off the coast of Alaska.

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

Preliminary processing has been done with data from 17 stations, accurate processing - with data from 74.

The red marker the map shows the epicenter of the earthquake, the origin of which was in the Pacific Ocean, S of the Alaska Peninsula, USA at a depth of 50 km, 163 km E-NE of Perryville and 670 km SW of Anchorage.
Time in origin (GMT) Latitude, degree Longitude, degree Depth, km Stations number Ms/N mb/N I0 (calculated) GAP Center
1 09:10:22.0 56.31 -156.67 50.0 74 6.7/41 7.2/49 7-7.5 130 GS RAS(Verified)
Federal research center, Geophysical survey of Russian Academy of Sciences
2 09:10:17.3 56.56 -156.82 10.0 17 7.5/16 GS RAS(Preliminary)
Federal research center, Geophysical survey of Russian Academy of Sciences
3 09:10:24.6 56.41 -156.67 58.1 940 Mw 6.9 40 CSEM
European - Mediterranean seismological center
4 09:10:24.7 56.26 -156.55 69.1 104 Mw 6.9 NEIC
National Earthquakes Information Center of US Geological Service