Information message about a strong earthquake in western Turkey on October 27, 2025

A strong earthquake (very strong at the epicenter on the SIS-17 scale) with M=6 occurred on October 27, 2025 at 19:48 GMT (22:48 Moscow Time) in western Turkey.<br /> SIS-17 - Earthquakes. Seismic intensity scale. State Standard 57546–2017.

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 15 stations, accurate processing - with data from 69.

The red marker on the map is the epicenter of the earthquake, which was located in Balikesir Province in western Turkey, at a depth of 10 km, 14 km NW of Sindirgi, 40 km S-SE of Balikesir, 125 km NE of Izmir, and 211 km SW of Istanbul.
Time in origin (GMT) Latitude, degree Longitude, degree Depth, km Stations number Ms/N mb/N I0 (calculated) GAP Center
1 19:48:29.0 39.31 28.05 10.0 69 6.0/53 5.9/41 8.5 80 GS RAS(Verified)
Federal research center, Geophysical survey of Russian Academy of Sciences
2 19:48:36.4 39.67 28.03 33.0 15 6.3/15 6.5-7 GS RAS(Preliminary)
Federal research center, Geophysical survey of Russian Academy of Sciences
3 19:48:28.8 39.18 28.23 6.0 1402 Mw 6.0 6.0/298 9 CSEM
European - Mediterranean seismological center
4 19:48:28.9 39.23 28.23 8.0 125 5.8/25 5.7/669 21 NEIC
National Earthquakes Information Center of US Geological Service