Alaska earthquakes

M2.9 earthquake 119 km S of Atka, Alaska

A magnitude 2.9 earthquake struck 119 km S of Atka, Alaska on Mon, Jun 18, 2018, 11:23 PM HADT (08:23 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M5.2 97 km SSW of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.9 (ML, local (Richter)), micro
Magnitude from: USGS National Earthquake Information Center
Local time: Mon, Jun 18, 2018, 11:23 PM HADT
UTC: 2018-06-19 08:23:53 UTC
Depth: 25.7 km (16.0 mi), shallow
Epicenter: 51.129° N, 174.351° W
Region: Alaska
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
2.9	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.148 · 6 stations
2.5	ML, local (Richter)	Alaska Earthquake Center	Preliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.4 km horizontally, 8.0 km in depth
Magnitude uncertainty: ±0.15
Stations used: 12

Nearby

Within 100 km, magnitude 1.5 and up: 64 in the 60 days after this one and 30 in the 30 days before it.

After

The first 60 of 64.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000ez08 (also filed as ak19795132, ak0187ta9if7). Read Fri, Oct 2, 2026, 2:47 AM UTC.