Information message about the strong earthquake near the coast of Alaska on October 19, 2020.

A strong earthquake with M = 7.7 (destructive at the epicenter on the SHSI-17 scale) occurred on October 19, 2020 at 20:54 GMT (23:54 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 12 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 61.

The map marker shows the epicenter of the earthquake, the origin of which was located S off the Alaska Peninsula, USA, at a depth of 33 km, 77 km SE off Sand Point and 141 km SW off Perryville.
Time in origin (GMT) Latitude, degree Longitude, degree Depth, km Stations number Ms/N mb/N I0 (calculated) GAP Center
1 20:54:39.1 54.72 -159.94 33.0 61 7.7/35 7.4/47 9-9.5 70 GS RAS(Verified)
Federal research center, Geophysical survey of Russian Academy of Sciences
2 20:54:35.5 54.88 -159.82 10.0 11 6.7/10 9.5-10 GS RAS(Preliminary)
Federal research center, Geophysical survey of Russian Academy of Sciences
3 20:54:40.7 54.71 -159.75 40.0 369 Mw 7.5 50 CSEM
European - Mediterranean seismological center
4 20:54:40.5 54.66 -159.68 40.1 140 Mw 7.5/89 7.1/99 52 NEIC
National Earthquakes Information Center of US Geological Service