On Friday Evening an M4.2 Earthquake struck in the Gulf Of Alaska near Anchorage (The United States).

Written by Earthquakelist.org on June 27th, 2026.

A MAG-4.2 earthquake struck in the Gulf Of Alaska 17 miles from Anchorage, The United States in the evening of Friday June 26th, 2026. Roughly 470 thousand people may have felt this earthquake.

Earthquake Summary

This earthquake hit under water in the Gulf Of Alaska, right off the coast of The United States (8 km offshore), 17 miles southwest of Anchorage in Alaska. The center of this earthquake had a quite shallow depth of 29 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time:	Jun 26, 2026 09:25PM (Anchorage Time) - Jun 27, 2026 05:25 Universal Time.
Location:	17 mi SW of Anchorage, Alaska, The United States. Coordinates 60°59'17"N 150°7'30"W.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 4.2 Detected by 58 stations. Maximum Error Range ±0.105 .
Depth:	29 mi (47 km) A quite 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 95% 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 470 thousand people exposed to shaking

The USGS has published a report estimating the number of people exposed to this earthquake. Acoording to their analysis, roughly 470 thousand have been exposed to shaking at an MMI level of II or higher.

Weak shaking and probably no damage may have been experienced by an estimated 340,800 people. At III, it is the highest MMI level this earthquake has caused.

People	MMI Level	Shaking	Damage
11,270	I	Not noticable	None
129,200	II	Very weak	None
340,800	III	Weak	Probably none
0	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 The United States . Anchorage in Alaska, The United States is the nearest significant place from the epicenter. The earthquake occurred 17 miles (28 km) southwest of Anchorage. Anchorage experienced an earthquake intensity (MMI Scale) of roughly III. That level implies weak shaking and probably no damage.

Overview of nearby places

Cities and Towns around the epicenter of this earthquake.
Distance	Place	Intensity (MMI)
17 mi (28 km) NE from epicenter	Anchorage Alaska, The United States.	III Weak
30 mi (48 km) NE from epicenter	Eagle River Alaska, The United States.	III Weak

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

Earthquake Intensity Map based on Shakemap Data provided by USGS.

Aftershocks detected

In the days before this main shock, 4 smaller foreshocks were detected. Roughly 3 days before this earthquake, a foreshock measuring MAG-2.9 was detected nearby this earthquake.

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 2.9	3 days earlier Jun 24, 2026 12:46AM (Anchorage Time)	45 mi (72 km) N from Main Shock.
Foreshock	M 2.6	2 days earlier Jun 24, 2026 03:08PM (Anchorage Time)	59 mi (95 km) NW from Main Shock.
Foreshock	M 2.6	10 hrs earlier Jun 26, 2026 11:20AM (Anchorage Time)	56 mi (91 km) NW from Main Shock.
Foreshock	M 2.5	5 hrs earlier Jun 26, 2026 04:22PM (Anchorage Time)	35 mi (57 km) N from Main Shock.
Main Shock This Earthquake	M 4.2	Jun 26, 2026 09:25PM (Anchorage Time)	-

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.

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. This is the strongest earthquake to hit since June 27th, 2026, when a 4.9 magnitude earthquake hit 71 mi (114 km) further southwest. An even stronger magnitude 7.1 earthquake struck on November 30th, 2018.

In total, 168 earthquakes with a magnitude of 4.2 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 22 days.

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 4.2. Earthquakes of this strength are unlikely to trigger a tsunami.	This earthquake occurred at a depth of of 29 mi (47 km). Earthquakes this shallow could trigger a tsunami.

Sources

Last updated 27/06/26 19:28 (). 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.