Location:

Period:

1 Aug 2025 02:48:55 - 2 Aug 2025 11:06:02 (1 day 8 hours 17 minutes)

Volcanoes in 100km radius:

Ksudach(98km), Khodutka(99km)

Earthquakes:

20 swarms found nearby.

2001

PS20011008.1(150.8km)

7 Oct

1 day 4 hours

6 earthquakes

2013

PS20130519.1(137.1km)

18 May

2 days 16 hours

33 earthquakes

2024

PS20240817.1(162.0km)

17 Aug

3 hours

5 earthquakes

2025

PS20250720.1(170.9km)

20 Jul

2 days 17 hours

44 earthquakes

PS20250730.3(140.6km)

29 Jul

2 days 23 hours

69 earthquakes

PS20250730.4(74.3km)

29 Jul

1 day 13 hours

45 earthquakes

PS20250729.1(108.1km)

29 Jul

2 days 20 hours

67 earthquakes

PS20250730.5(164.5km)

30 Jul

2 days 11 hours

12 earthquakes

S20250731.1(46.5km)

30 Jul

4 days 14 hours

45 earthquakes

PS20250803.1(163.1km)

2 Aug

1 day 2 hours

9 earthquakes

PS20250803.2(102.4km)

3 Aug

13 hours

8 earthquakes

PS20250806.1(42.8km)

5 Aug

1 day 11 hours

7 earthquakes

PS20250824.1(114.6km)

23 Aug

23 hours

5 earthquakes

PS20250911.1(54.8km)

10 Sep

16 hours

6 earthquakes

PS20250918.1(159.7km)

18 Sep

2 days 8 hours

36 earthquakes

PS20250922.1(38.4km)

22 Sep

2 hours

5 earthquakes

PS20251003.1(56.7km)

3 Oct

14 hours

6 earthquakes

PS20251005.1(64.4km)

4 Oct

22 hours

5 earthquakes

PS20251103.1(110.0km)

3 Nov

1 day 16 hours

15 earthquakes

2026

PS20260619.1(180.2km)

19 Jun

20 hours

7 earthquakes

AI-generated article — for informational and entertainment purposes only. May contain inaccuracies. Full disclaimerFound an error?

Seismic Swarm PS20250801.1 East of Ozernovskiy, Russia

A seismic swarm designated PS20250801.1 was recorded 99 km east of Ozernovskiy on Russia’s Kamchatka Peninsula. The sequence began at 02:48 on 1 August 2025 and concluded at 11:06 on 2 August 2025, spanning 32 hours and 17 minutes. During this interval, six earthquakes were registered, with magnitudes ranging from 4.3 to 5.6 and focal depths between 23 km and 64 km.

The events occurred in rapid succession on 1 August, beginning with a magnitude 5.1 shock at 02:48:55 (35 km depth), followed by another magnitude 5.1 event at 08:31:58 (43 km depth). A magnitude 4.3 earthquake struck at 13:19:16 (64 km depth), succeeded within minutes by a magnitude 5.0 event at 13:26:34 (35 km depth). The largest shock, magnitude 5.6, occurred at 13:44:14 (23 km depth). The swarm ended with a magnitude 5.4 event on 2 August at 11:06:02 (28 km depth). These closely spaced occurrences illustrate typical swarm behavior, in which numerous events of similar magnitude unfold without a single dominant mainshock.

The location lies within the tectonically active Kamchatka Peninsula, part of the Pacific Ring of Fire. Here, the Pacific Plate subducts beneath the Okhotsk Plate along the Kuril-Kamchatka Trench, generating frequent earthquakes and volcanic activity. The regional crust experiences ongoing compression and deformation, resulting in both shallow crustal events and deeper Wadati-Benioff zone seismicity. Historical records document persistent seismic productivity in this sector, consistent with long-term plate-boundary dynamics.

Seismic swarms have been documented in the area since 2000, with nine episodes recorded through 2025. Earlier swarms occurred in 2001, 2013, and 2024, while the 2025 sequence accounts for six of the total events. Such clustering reflects episodic strain release along the subduction interface and associated fault systems.

References

USGS Earthquake Hazards Program – Kamchatka seismicity overview
Global CMT Catalog – regional focal mechanisms
Russian Academy of Sciences Far East Geological Institute – Kamchatka tectonics summaries