Significant M5.8 AFTERSHOCK struck on Saturday Afternoon in the North Pacific Ocean 140km from Petropavlovsk-Kamchatsky (Russia).

Written by Earthquakelist.org on June 20th, 2026.

In the North Pacific Ocean 140 kilometer from Petropavlovsk-Kamchatsky, Russia, a significant MAG-5.8 aftershock occurred in the afternoon of Saturday June 20th, 2026. Around 260 thousand people have been exposed to shaking.

Earthquake Summary

This earthquake hit under water in the North Pacific Ocean, 77 kilometers (48 mi) off the coast of Russia, 140 kilometer east of Petropavlovsk-Kamchatsky in Kamchatka. The center of this earthquake had a quite shallow depth of 35 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time:	Jun 20, 2026 15:49 (Kamchatka Time) - Jun 20, 2026 03:49 Universal Time.
Location:	140 km east of Petropavlovsk-Kamchatsky, Kamchatka, Russia. Coordinates 52°43'43"N 160°38'28"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 5.8 Detected by 18 stations. Maximum Error Range ±0.073 .
Depth:	35 km (22 mi) A quite shallow depth.
Max. Intensity:	V Moderate 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 90% likelyhood of between 0 and 1 fatalities.

The USGS classifies the economic impact of this earthquake at level GREEN (low). They expect an 90% likelyhood of between 0 and 1 million US Dollars in economic damage and impact.

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.

The highest earthquake impact level for this earthquake is IV, which corresponds with light shaking and likely no damage. Roughly 480 people are expected to be exposed to this level. 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 .

People	MMI Level	Shaking	Damage
0	I	Not noticable	None
10	II	Very weak	None
255,800	III	Weak	Probably none
480	IV	Light	Likely none
0	V	Moderate	Very light
0	VI	Strong	Light
0	VII	Very Strong	Moderate
0	VIII	Severe	Moderate to heavy
0	IX	Violent	Heavy
0	X	Extreme	Very heavy

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 140 kilometer (87 mi) east 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

Cities and Towns around the epicenter of this earthquake.
Distance	Place	Intensity (MMI)
140 km (87 mi) W from epicenter	Petropavlovsk-Kamchatsky Kamchatka, Russia.	III Weak
152 km (94 mi) W from epicenter	Vilyuchinsk Kamchatka, Russia.	III Weak
160 km (99 mi) W from epicenter	Yelizovo Kamchatka, Russia.	III Weak

Earthquake Intensity Map

The graph below overlays a map of the region around the epicenter with earthquake intensity data provided by the US Geographic Survey. The highest intensity level detected 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

Earthquake Intensity Map based on Shakemap Data provided by USGS.

This is likely an aftershock

This earthquake is likely an aftershock of the MAG-6.6 earthquake that struck 21 hrs earlier. That main earthquake hit 9 km (6 mi) northwest of the epicenter of this MAG-5.8 aftershock.

Overview of foreshocks and aftershocks

Detected MAG2.5+ earthquakes within within 100km (62 mi), that occurred in the three days before and after the main shock.
Classification	Magnitude	When	Where
Foreshock	M 4.3	2 days earlier Jun 18, 2026 04:45 (Kamchatka Time)	20 km (13 mi) SE from Main Shock.
Foreshock	M 6.0	1 min earlier Jun 19, 2026 18:51 (Kamchatka Time)	23 km (14 mi) SE from Main Shock.
Main Shock	M 6.6	Jun 19, 2026 18:52 (Kamchatka Time)	-
Aftershock	M 4.9	13 mins later Jun 19, 2026 19:05 (Kamchatka Time)	37 km (23 mi) E from Main Shock.
Aftershock	M 5.0	17 mins later Jun 19, 2026 19:09 (Kamchatka Time)	18 km (11 mi) NE from Main Shock.
Aftershock	M 4.9	26 mins later Jun 19, 2026 19:18 (Kamchatka Time)	19 km (12 mi) W from Main Shock.
Aftershock	M 4.5	56 mins later Jun 19, 2026 19:48 (Kamchatka Time)	31 km (19 mi) E from Main Shock.
Aftershock	M 5.8	1 hr later Jun 19, 2026 19:52 (Kamchatka Time)	38 km (23 mi) E from Main Shock.
Aftershock	M 5.2	1 hr later Jun 19, 2026 20:03 (Kamchatka Time)	34 km (21 mi) E from Main Shock.
Aftershock	M 4.4	2 hrs later Jun 19, 2026 21:02 (Kamchatka Time)	30 km (19 mi) SE from Main Shock.
Aftershock	M 4.4	4 hrs later Jun 19, 2026 22:40 (Kamchatka Time)	23 km (14 mi) N from Main Shock.
Aftershock	M 4.5	20 hrs later Jun 20, 2026 14:46 (Kamchatka Time)	41 km (26 mi) S from Main Shock.
Aftershock This Earthquake	M 5.8	21 hrs later Jun 20, 2026 15:49 (Kamchatka Time)	9 km (6 mi) SE from Main Shock.
Aftershock	M 4.9	22 hrs later Jun 20, 2026 16:38 (Kamchatka Time)	46 km (28 mi) E from Main Shock.
Aftershock	M 4.5	1 day later Jun 20, 2026 18:52 (Kamchatka Time)	41 km (26 mi) E from Main Shock.

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.

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.

Read: How to Stay Safe during an Earthquake (cdc.gov).

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. In total, 54 earthquakes with a magnitude of 5.8 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 2 months.

Low tsunami risk

DISCLAIMER: We strongly suggest to closely monitor advice from local authorities with regards to tsunami risks. Our analysis is based on automatically collected data from external sources, and these might contain mistakes. In addition, earthquakes can cause landslides that may lead to a tsunami, or be a followed by another, potentially stonger, earthquake.

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

Factor	Under Sea?	MAG-6.5 or stronger?	Shallow depth?
Explanation	Almost all tsunami's are caused by earthquakes with their epicenter under sea or very near the sea. However stay cautious in coastal areas as earthquakes on land may cause landslides into sea, potentially still causing a local tsunami.	Under MAG 6.5: Very unlikely to cause a tsunami. MAG 6.5 to 7.5: Destructive tsunami's do occur, but are uncommon. Likely to observe small sea level changes. MAG 7.6+: Earthquakes with these magnitudes might produce destructive tsunami's.	Most destructive tsunami's are caused by shallow earthquakes with a depth between 0 and 100km under the surface of the earth. Deeper tsunami's are unlikely to displace to ocean floor.
This Earthquake	This earthquake appears to have struck under the sea.	Not this earthquake. This earthquake had a magnitude of 5.8. Earthquakes of this strength are unlikely to trigger a tsunami.	This earthquake occurred at a depth of of 35 km (22 mi). Earthquakes this shallow could trigger a tsunami.

Sources

Last updated 20/06/26 18:08 (). 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.