M4.7 Earthquake struck on Tuesday Night near Anchorage in The United States.

Written by Earthquakelist.org on April 29th, 2025. Last updated May 20th, 2025.

Just after midnight of Tuesday April 29th, 2025, a MAG-4.7 earthquake hit under land 34 miles from Anchorage in The United States. The USGS has indicated there is a potential risk at tsunami's following this earthquake.

Earthquake Summary

The earthquake struck on land in The United States, 34 miles (55 km) south of Anchorage in Alaska. The center of this earthquake had a quite shallow depth of 26 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time:	Apr 29, 2025 12:03AM (Anchorage Time) - Apr 29, 2025 08:03 Universal Time.
Location:	34 mi south of Anchorage, Alaska, The United States. Coordinates 60°43'55"N 150°2'27"W.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 4.7 Detected by 19 stations. Maximum Error Range ±0.039 .
Depth:	26 mi (42 km) A quite shallow depth.
Max. Intensity:	IV Light On the Modified Mercalli Scale.
Tsunami Risk:	Potential tsunami risk The USGS has indicated there is a potential risk at tsunami's following this earthquake. Always stay cautious - More info here.

Potential 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.

There is a potential tsunami risk in the aftermath of this earthquake, immediately evacuate to higher grounds away from coastal areas and monitor advice from local authorities. The US Geographic Survey organization has indicated a potential risk for tsunami's following this earthquake.

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 on land near a coastal area (12 mi from the sea).	Not this earthquake. This earthquake had a magnitude of 4.7. Earthquakes of this strength are unlikely to trigger a tsunami.	This earthquake occurred at a depth of of 26 mi (42 km). Earthquakes this shallow could trigger a tsunami.

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 69% likelyhood of between 0 and 1 fatalities, and a 98% 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 470 thousand people exposed to shaking

An estimated 470 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.

Light shaking and likely no damage may have been experienced by an estimated 100 people. At IV, it is the highest MMI level this earthquake has caused. Intensity level III was experienced by the majority of people (around 430 thousand). In their region, weak shaking and probably no damage can be expected.

People	MMI Level	Shaking	Damage
4,540	I	Not noticable	None
44,720	II	Very weak	None
425,200	III	Weak	Probably none
100	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 . The closest significant population center near the earthquake is Anchorage in Alaska, The United States. Anchorage is located 34 miles (55 km) south of the epicenter. 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)
34 mi (55 km) N from epicenter	Anchorage Alaska, The United States.	III Weak
43 mi (70 km) NNE from epicenter	Eagle River Alaska, The United States.	III Weak

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

Earthquake Intensity Map based on Shakemap Data provided by USGS.

3 Aftershocks detected

This main shock was followed by 3 smaller aftershocks. Just 1 day after this main shock, an earthquake measuring MAG-2.8 was detected 0.8 mi (1.3 km) south-southeast of 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
Main Shock This Earthquake	M 4.7	Apr 29, 2025 12:03AM (Anchorage Time)	-
Aftershock	M 2.6	12 hrs later Apr 29, 2025 11:41AM (Anchorage Time)	0.6 mi (1 km) ESE from Main Shock.
Aftershock	M 2.6	1 day later Apr 30, 2025 01:27AM (Anchorage Time)	1.7 mi (2.8 km) NW from Main Shock.
Aftershock	M 2.8	1 day later Apr 30, 2025 01:58AM (Anchorage Time)	0.8 mi (1.3 km) SSE from Main Shock.

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.

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 May 11th, 2024, when a 4.8 magnitude earthquake hit 115 mi (185 km) further southwest. An even stronger magnitude 7.1 earthquake struck on November 30th, 2018.

In total, 62 earthquakes with a magnitude of 4.7 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.

Sources

Last updated 20/05/25 01:58 (). 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.