M5.8 Earthquake: 262 km SSW of Severo-Kuril’sk, Russia

Updated 09:05 UTC · 29 Oct 2026

A magnitude 5.8 earthquake struck 262 km SSW of Severo-Kuril’sk, Russia at 16:48 UTC on 6 Oct 2026, at a depth of 29 km, reported by USGS. USGS PAGER issued a green alert: little or no damage and a low chance of deaths. USGS did not set a tsunami flag for this quake. So far 4 aftershocks of M2.5+ have been recorded within 50 km, the largest a M4.9.

M5.8

Magnitude (USGS)

mww

29 km

Depth

shallow

GREEN

USGS PAGER impact alert

estimated impact

Aftershocks M2.5+ so far

within 50 km

[ fig. 1 ] M5.8 EPICENTRE, AFTERSHOCKS AND PAST QUAKESThis quakeAftershock M5+AftershockPast M6+

USGS · updated 09:05 UTC 2026-10-29Tap a point for details · pinch or ctrl + scroll to zoomTrack this live in the app ›

Nearest places

Severo-Kuril’sk, Sakhalin Oblast, Russia263 km from the epicentre · quake was SSW of here · population 2,422263 KM
Vilyuchinsk, Kamchatka, Russia557 km from the epicentre · quake was SSW of here · population 25,204557 KM
Petropavlovsk-Kamchatsky, Kamchatka, Russia577 km from the epicentre · quake was SSW of here · population 181,216577 KM
Yelizovo, Kamchatka, Russia581 km from the epicentre · quake was SSW of here · population 40,692581 KM
Poronaysk, Sakhalin Oblast, Russia872 km from the epicentre · quake was E of here · population 16,677872 KM

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Strongest aftershocks so far

Key context

Tectonic setting

Kuril-Kamchatka Trench. The Pacific Plate dives beneath the Okhotsk Plate along the Kuril-Kamchatka Trench at about 8 cm per year. This trench produced the M9.0 Kamchatka quake of 1952 and a M8.8 quake off Kamchatka in July 2025; deep quakes under the Sea of Okhotsk come from the same sinking slab.

The USGS moment tensor shows thrust (reverse) faulting: one block of crust was pushed up and over the other, the typical motion where plates converge.

At 29 km it was a shallow quake (USGS counts 0 to 70 km as shallow). Most damaging quakes are in this range.

Shaking and impact

USGS PAGER estimates the impact from the shaking and the number of people exposed. For this quake it issued a green alert: little or no damage and a low chance of deaths (fatality alert: green, economic loss alert: green). PAGER is an early estimate and can change as reports come in.

The USGS ShakeMap estimates the strongest shaking at intensity IV on the Modified Mercalli scale (light).

USGS had no "Did You Feel It?" reports for this quake when this page was updated; remote and offshore quakes often get none.

Aftershocks

This page counts quakes of M2.5 or more within 50 km after the main shock, from the USGS catalog (last checked 09:05 UTC, 29 Oct 2026): 4 aftershocks so far.

Aftershocks are normal after a quake of this size. They usually become less frequent over days and weeks, but a strong aftershock can still happen, and in a few sequences a later quake is larger. No one can predict their exact time or size; follow the official agency for your area.

Earthquake history within 250 km

Since 1976, USGS lists 761 quakes of M5 or more within 250 km of this epicentre, about 15 a year. Since 1900 the same circle had 239 quakes of M5.8 or larger.

Largest earlier quakes within 250 km, USGS catalog since 1900 (M6+).
Magnitude	Place (USGS)	Date	Depth
M8.3	2006 Kuril Islands Earthquake	2006-11-15	10 km
M8.1	2007 Kuril Islands Earthquake	2007-01-13	10 km
M7.8	266 km SSW of Severo-Kuril’sk, Russia	1915-05-01	30 km
M7.7	east of the Kuril Islands	1963-03-16	15 km
M7.5	221 km SSE of Severo-Kuril’sk, Russia	2020-03-25	58 km
M7.4	east of the Kuril Islands	2009-01-15	36 km
M7.2	Kuril Islands	1925-01-18	35 km
M7.0	Kuril Islands	1927-02-16	15 km

Official information

EMSC (European-Mediterranean Seismological Centre)
USGS event page for this quake (ShakeMap, PAGER, felt reports)
tsunami.gov for US tsunami bulletins

Data status

USGS review status: reviewed. Magnitude type: mww. USGS last updated this event on 7 Oct 2026 at 16:54 UTC. Magnitude, depth and location can still be revised; this page keeps the same address if they change.

Questions and answers

How strong was the earthquake near Severo-Kuril’sk, Russia?

USGS measured it at magnitude 5.8 (mww), 29 km deep. The strongest estimated shaking was intensity IV (light). Quakes of M5 to 5.9 are classed as moderate.

Was there a tsunami?

USGS did not set a tsunami flag for this quake. If you are on a coast and feel strong or long shaking, move to high ground anyway, and follow local officials.

Was the earthquake felt?

USGS had no felt reports when this page was updated. That is common for offshore and remote quakes. If you felt it, you can report it on the USGS event page.

Will there be more aftershocks?

Aftershocks are likely to continue for days to weeks, becoming less frequent over time. So far 4 aftershocks of M2.5+ have been listed. Most sequences do not produce a larger quake, but some do. No one can predict the time or size of the next one; follow EMSC (European-Mediterranean Seismological Centre).

What should I do after a strong earthquake?

Expect aftershocks: Drop, Cover and Hold On when shaking starts again. Check for injuries and damage, stay out of damaged buildings, and use text messages instead of calls so emergency lines stay free. On a coast, move to high ground after strong shaking. Follow your local officials.

Related live pages

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Sources

USGS event page: magnitude, location, ShakeMap, PAGER and Did You Feel It? data for this event. Public domain. Credit: U.S. Geological Survey.
USGS ComCat (FDSN event web service): the USGS earthquake catalog, used for the 30-year counts, history and aftershocks. Public domain. Credit: U.S. Geological Survey.
USGS Geoserve: nearest places to the epicentre.
GeoNames: large-city coordinates, CC BY 4.0.

Page built 09:05 UTC, 2026-10-29. Full list: data sources and method.