Alaska earthquakes

M3.6 earthquake 5 km WSW of Anchorage, Alaska

A magnitude 3.6 earthquake struck 5 km WSW of Anchorage, Alaska on Tue, Jun 30, 2020, 2:58 PM AKDT (22:58 UTC), 45 km (28 mi) below the surface.

A larger quake followed: M3.9 14 km NW of Nikiski, Alaska. This one was a foreshock.

Anchorage forecast More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.6 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Tue, Jun 30, 2020, 2:58 PM AKDT
UTC: 2020-06-30 22:58:22 UTC
Depth: 45.1 km (28.0 mi), shallow
Epicenter: 61.192° N, 149.982° W
Region: Alaska
Felt reports: 218
Strongest shaking: III, weak shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.6	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.8	Mwr, regional moment	USGS National Earthquake Information Center	Reviewed · ±0.041 · 57 stations

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: III, weak shaking
Peak ground acceleration: 288.0% of gravity
Peak ground velocity: 0.2 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

218 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Oblique normal
Moment magnitude: 3.8 Mwr
Nodal plane 1: Strike 23°, dip 33°, rake -60°
Nodal plane 2: Strike 169°, dip 62°, rake -108°

How well it is located

Reviewed by a seismologist.

Stations used: 216

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Anchorage, AlaskaPopulation 289,600. Forecast5 kmWSW

Nearby

Within 100 km, magnitude 1.5 and up: 181 in the 60 days after this one and 78 in the 30 days before it.

After

The first 60 of 181.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0208dd96es (also filed as us7000afhw). Read Thu, Oct 1, 2026, 11:33 AM UTC.