Information message about the strong earthquake in the Pacific Ocean, on the east coast of Honshu Island, Japan, March 20, 2021.

An earthquake (strong at the epicenter on the SHSI-17 scale) with M = 6.7 occurred on March 20, 2021 at 09:09 GMT (12:09 Moscow time) in the Pacific Ocean, on the east coast of Honshu Island, Japan.

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 9 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 red marker on the map is the epicenter of the earthquake, the origin was in the Pacific Ocean, on the east coast of Honshu Island, Japan, at a depth of 60 km, 79 km E-NE of Sendai, 264 km S-SE of Aumori and 360 km N-NE from Tokyo, capital of Japan.
Time in origin (GMT) Latitude, degree Longitude, degree Depth, km Stations number Ms/N mb/N I0 (calculated) GAP Center
1 09:09:45.0 38.56 141.69 60.0 61 6.7/19 7.0/27 6.5-7 152 GS RAS(Verified)
Federal research center, Geophysical survey of Russian Academy of Sciences
2 09:09:55.8 39.25 141.21 100.0 11 6.3/9 5-5.5 GS RAS(Preliminary)
Federal research center, Geophysical survey of Russian Academy of Sciences
3 09:09:46.5 38.52 141.55 60.0 217 Mw 7.0 36 CSEM
European - Mediterranean seismological center
4 09:09:45.3 38.48 141.67 54.0 110 Mw 7.0/26 60 NEIC
National Earthquakes Information Center of US Geological Service