Alaska earthquakes

M1.6 earthquake 78 km SW of Nanwalek, Alaska

A magnitude 1.6 earthquake struck 78 km SW of Nanwalek, Alaska on Tue, Sep 11, 2018, 8:19 AM AKDT (16:19 UTC), 68 km (42 mi) below the surface.

A larger quake followed: M4.2 19 km SSW of Anchor Point, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 1.6 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Sep 11, 2018, 8:19 AM AKDT
UTC: 2018-09-11 16:19:31 UTC
Depth: 68.2 km (42.4 mi), shallow
Epicenter: 58.944° N, 153.036° 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
1.6	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.6	ML, local (Richter)	AACSE	Preliminary
1.31	ML, local (Richter)	AV	Final · ±0.254 · 12 stations

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used: 35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 95 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018boc5849 (also filed as av61774951, aacse018boc5849). Read Fri, Oct 2, 2026, 1:27 AM UTC.