Earthquakes in Russia — September 2025

261 earthquakes were recorded in Russia during September 2025, an average of 8.7 per day.

261 reached magnitude 4 or above and 77 reached magnitude 5 or above. The average focal depth was 35 km.

The month's largest event in Russia was a magnitude 7.8 earthquake near Petropavlovsk-Kamchatsky, Russia on 18 September 2025 at 18:58 UTC. A magnitude 7.8 earthquake radiates roughly 7.6 million tons of TNT equivalent in seismic energy.

That is well above the Russia monthly average of 90 events over the period we cover — an unusually active month, and down from the 457 recorded the previous month.

91% of events here are shallow (under 70 km), 9% intermediate (70–300 km) and 0% deep-focus (over 300 km). Almost everything here is crustal. That is characteristic of transform faulting or continental deformation rather than subduction — and it means shaking at the surface is strong for the magnitudes involved.

By band, the catalogue holds 184 in the magnitude 4 range, 72 in the magnitude 5 range, 1 in the magnitude 6 range, 4 in the magnitude 7 range.

Activity peaked on 19 September, when 51 events were recorded.

3 event(s) this month carry a USGS link to NOAA tsunami information; the flag does not indicate whether a tsunami occurred.

The month's largest events were M7.8 near Petropavlovsk-Kamchatsky, Russia on 18 September at 10 km; M7.8 near Petropavlovsk-Kamchatsky, Russia on 18 September at 20 km; M7.7 near Petropavlovsk-Kamchatsky, Russia on 13 September at 10 km.

That is 190% above the 90 events Russia averages per month across the 21 months on record.