Alaska earthquakes

M2.7 earthquake 74 km NNW of Atka, Alaska

A magnitude 2.7 earthquake struck 74 km NNW of Atka, Alaska on Wed, Jul 24, 2019, 12:57 PM HADT (21:57 UTC), 196 km (122 mi) below the surface.

A larger quake followed: M4.2 70 km ENE of Atka, 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
2.7 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2019-07-24 21:57:56 UTC
Depth
196.1 km (121.9 mi), intermediate-depth
Epicenter
52.789° N, 174.723° 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.ScaleComputed byNotes
2.7ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.115 · 10 stations
2.5ML, local (Richter)Alaska Earthquake CenterPreliminary

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 14.1 km horizontally, 9.5 km in depth
Magnitude uncertainty
±0.12
Stations used
26

Nearby

Within 100 km, magnitude 1.5 and up: 49 in the 60 days after this one and 23 in the 30 days before it.

After

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us600055n1 (also filed as ak0199fe0pig). Read Thu, Oct 1, 2026, 6:52 PM UTC.