On Saturday Night a Shallow M6.1 Earthquake struck in the North Pacific Ocean 182km from Petropavlovsk-Kamchatsky (Russia).

Written by Earthquakelist.org on October 3rd, 2025. Last updated December 2nd, 2025.

In the North Pacific Ocean 182 kilometer from Petropavlovsk-Kamchatsky, Russia, a shallow and strong M6.1 earthquake occurred in the night of Saturday October 4th, 2025. Roughly 260 thousand people may have felt this earthquake.

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Earthquake Summary

This earthquake hit under water in the North Pacific Ocean, 164 kilometers (102 mi) off the coast of Russia, 182 kilometer south-southeast of Petropavlovsk-Kamchatsky in Kamchatka. The center of this earthquake had a very shallow depth of 19 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time:	Oct 4, 2025 04:07 (Kamchatka Time) - Oct 3, 2025 16:07 Universal Time.
Location:	182 km SSE of Petropavlovsk-Kamchatsky, Kamchatka, Russia. Coordinates 51°37'39"N 159°54'30"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 6.1 Detected by 58 stations. Maximum Error Range ±0.041 .
Depth:	19 km (12 mi) A very shallow depth.
Max. Intensity:	IV Light On the Modified Mercalli Scale.
Tsunami Risk:	Low tsunami risk Earthquakes under MAG-6.5 do not usually cause tsunami's. Always stay cautious - More info here.

Minimal impact predicted

Based on scientific estimates by the US Geographic Survey (USGS), the risk of high fatalities for this earthquake is classified at level GREEN (low). They expect an 65% likelyhood of between 0 and 1 fatalities, and a 96% chance that the number of fatalities falls no higher than 10.

The USGS classifies the economic impact of this earthquake at level GREEN (low). They expect an 65% likelyhood of between 0 and 1 million US Dollars in economic damage and impact, and a 96% chance that the economic impact of this earthquake falls no higher than 10 million USD.

Roughly 260 thousand people exposed to shaking

This earthquake may have been felt by around 260 thousand people. That is the expected population size of the area exposed to a level of shaking of II or higher on the Modified Mercalli scale according to the USGS.

An estimated 100 people were exposed to level IV. At this level, light shaking and likely no damage can be expected. The majority of people (roughly 260 thousand) live in an area exposed to level III, where weak shaking and probably no damage is expected. All exposure to shaking was within the borders of Russia .

Nearby towns and cities

This earthquake may have been felt in Russia . The closest significant population center near the earthquake is Vilyuchinsk in Kamchatka, Russia. Vilyuchinsk is located 177 kilometer (110 mi) south-east of the epicenter. The intensity of shaking and damage in Vilyuchinsk is estimated to be around level III on the Modified Mercalli Intensity scale (weak shaking, probably no damage).

Overview of nearby places

Earthquake Intensity Map

The intensity in shaking and damage by this earthquake is illustrated through the map below. The highest intensity measured for this earthquake is IV.

I Not felt

II Weak

III Weak

IV Light

V Moderate

VI Strong

VII Very Strong

VIII Severe

IX Violent

X Extreme

53 Aftershocks detected

After this earthquake struck, 53 smaller aftershocks occurred. Just 2 days after this main shock, an earthquake measuring MAG-5.2 was detected 27 km (17 mi) southwest of this earthquake.

In the days before this main shock, 24 smaller foreshocks were detected. Roughly 10 hrs before this earthquake, a foreshock measuring MAG-5.3 was detected nearby this earthquake.

Overview of foreshocks and aftershocks

More earthquakes coming?

Aftershocks are usually at least 1 order of magnitude less strong than main shocks. The more time passes, the smaller the chance and likely strength of any potential aftershocks.

It's always adviced to be cautious of the risk of a larger shock following any significant earthquake, however this risk is fairly small. There is a roughly 94 percent change that no larger main shock will follow in the days following this earthquake.

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. This is the strongest earthquake to hit since September 18th, 2025, when a 7.8 magnitude earthquake hit 177 km (110 mi) further north-northeast. An even stronger magnitude 8.8 earthquake struck on July 29th, 2025.

In total, 16 earthquakes with a magnitude of 6.1 or higher have been registered within 300km (186 mi) of this epicenter in the past 10 years. This comes down to an average of once every 8 months.

Low tsunami risk

Based on early data it appears this earthquake was not strong enough (lower than MAG-6.5) to be likely to cause destructive tsunami's. However this earthquake appeared to have hit at a shallow depth under sea, so stay cautious and monitor advice from local authorities.

Tsunami Risk Factors

Sources

Last updated 02/12/25 00:38 (). As more information on this earthquake becomes available this article will be updated. This article is automatically composed based on data originating from multiple sources.

1. US Geographic Society (USGS): Earthquake us6000rei1
2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20251003_0000157
3. Geonames.org: World Cities Database
4. Google Maps: Static API
5. Earthquakelist.org: Historic Earthquakes Database

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