Alaska earthquakes

M1.9 earthquake 42 km ENE of Adak, Alaska

A magnitude 1.9 earthquake struck 42 km ENE of Adak, Alaska on Mon, Oct 29, 2018, 5:52 PM HADT (02:52 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.5 62 km ESE of Adak, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 1.9 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Mon, Oct 29, 2018, 5:52 PM HADT
UTC: 2018-10-30 02:52:46 UTC
Depth: 6.5 km (4.0 mi), shallow
Epicenter: 52.063° N, 176.089° 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
1.9	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.19	ML, local (Richter)	AV	Final · ±0.074 · 5 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: 16

Nearby

Within 100 km, magnitude 1.5 and up: 95 in the 60 days after this one and 70 in the 30 days before it.

After

The first 60 of 95.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018dx5c9ms (also filed as ak20303948, av61807036). Read Thu, Oct 1, 2026, 7:15 PM UTC.