Shallow M5.5 AFTERSHOCK struck on Tuesday Afternoon in the North Pacific Ocean 150km from Petropavlovsk-Kamchatsky (Russia).

Written by Earthquakelist.org on November 4th, 2025. Last updated November 9th, 2025.

In the North Pacific Ocean 150 kilometer from Petropavlovsk-Kamchatsky, Russia, a shallow and significant Magnitude 5.5 aftershock occurred in the late afternoon of Tuesday November 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, 99 kilometers (61 mi) off the coast of Russia, 150 kilometer east-southeast of Petropavlovsk-Kamchatsky in Kamchatka. The center of this earthquake had a very shallow depth of 21 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time:	Nov 4, 2025 16:45 (Kamchatka Time) - Nov 4, 2025 04:45 Universal Time.
Location:	150 km ESE of Petropavlovsk-Kamchatsky, Kamchatka, Russia. Coordinates 52°19'1"N 160°28'38"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 5.5 Detected by 350 stations. Maximum Error Range ±0.032 .
Depth:	21 km (13 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

An estimated 260 thousand have been exposed to shaking (An MMI or Modified Mercalli Intensity level II or higher) as a result of this earthquake according scientific estimates published by the USGS.

An estimated 40 people were exposed to level IV. At this level, light shaking and likely no damage can be expected. Intensity level III was experienced by the majority of people (around 260 thousand). In their region, weak shaking and probably no damage can be expected. All exposure to shaking was within the borders of Russia .

Nearby towns and cities

This earthquake may have been felt in Russia . Petropavlovsk-Kamchatsky in Kamchatka, Russia is the nearest significant place from the epicenter. The earthquake occurred 150 kilometer (93 mi) east-southeast of Petropavlovsk-Kamchatsky. The intensity of shaking and damage in Petropavlovsk-Kamchatsky 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 maximum intensity (MMI Scale) caused by this earthquake is IV. The map below shows in which areas this earthquake was the most and least impactful. It is based on data from the US Geographic Survey.

I Not felt

II Weak

III Weak

IV Light

V Moderate

VI Strong

VII Very Strong

VIII Severe

IX Violent

X Extreme

This is likely an aftershock

Approximately 20 hrs before this earthquake hit, a larger 6.1 magnitude earthquake struck 15 km (9 mi) south-southwest of this one. For that reason, we classify the Mag. 5.5 earthquake as an aftershock.

Overview of foreshocks and aftershocks

More earthquakes coming?

The risk of aftershocks decreases rapidly over time. Usually, aftershocks are at least one order of magnitude lower than a main shock.

In only six percent of cases, significant earthquakes are followed by a larger main shock, making the current earthquake a foreshock. While the chance of this happening is not so large, it is adviced to maintain cautiousness in the hours and days following a major earthquake.

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. In total, 99 earthquakes with a magnitude of 5.5 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 month.

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 09/11/25 04:18 (). This article contains currently available information about the earthquake and is automatically composed. We continue to update this article up to a few days after the earthquake occurred.

1. US Geographic Society (USGS): Earthquake us6000rlbm
2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20251104_0000096
3. Geonames.org: World Cities Database
4. Google Maps: Static API
5. Earthquakelist.org: Historic Earthquakes Database

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