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M 3.9 - 167 km WSW of Nikolski, Alaska

Source: USGS · Alaska

A magnitude 3.9 earthquake was recorded by USGS near 167 km WSW of Nikolski. On the USGS Earthquake Hazards Program scale, M3.9 is classified "Minor". Among the 1,782 earthquake reports Areazine has published, this M3.9 event ranks stronger than 44% of them (rank #969 by magnitude).

30 seconds on this earthquake report

Magnitude
M 3.9
USGS class
Minor
Location
167 km WSW of Nikolski
Archive rank
#969 of 1,782
Source
USGS
Published
September 22, 2026
MINOR

Stronger than 44% of the 1,782 earthquake reports in Areazine's archive, weaker than 968 others.

Record status: a snapshot from USGS, not a final record. Check USGS's own event page for aftershocks and any later revision to the magnitude shown here.

What Happened

A M 3.9 ml earthquake struck 167 km WSW of Nikolski, Alaska, on 2026-10-20 at 12:44:44 UTC. The event was recorded at a depth of 112 km.

Location Details

The earthquake was located at coordinates 52.149° N, 170.964° W. This depth of 112 km classifies it as a deep earthquake (greater than 70 km).

Impact Assessment

No felt reports were recorded. There was no tsunami advisory, and no alert level was issued.

What You Should Know

Earthquakes of this magnitude are classified as minor and are often felt but rarely cause damage. Residents in the region should be aware of the possibility of aftershocks.

Source

Data from USGS: https://earthquake.usgs.gov/earthquakes/eventpage/aka2026strgoh

Original source: USGS Official Notice ↗

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Comparable nationwide notices (length or severity timing) 8

Beyond this USGS earthquake report's own category, Areazine surfaces two nationwide peer sets: length-matched and severity/date-matched notices from elsewhere in the archive, distinct from the same-feed Related list above.

Similar body length

Nearest notices by article body length (721 characters here).

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Similar severity timing

Same severity (low) notices issued closest in time to September 22, 2026.

M 2.7 ml Earthquake Reported in England on September 21, 2026 low Yellow Frost Advisory for Red Lake - Woodland Caribou Park (Sep 21, 2026) low Yellow Frost Advisory for Nipigon - Rossport low M 2.7 ml Earthquake Reported in France on September 16, 2026 low

What People Ask

Common questions about this USGS earthquake report.

What magnitude was this earthquake? ▾
A magnitude 3.9 earthquake occurred 167 km WSW of Nikolski, Alaska, at a depth of 112 km.
What does an M3.9 "Minor" reading actually indicate? ▾
The USGS classifies M3.9 as "Minor" on its Earthquake Hazards Program scale. Events in this range are often felt near the epicenter and can cause minor damage to vulnerable structures, though widespread damage is uncommon.
Where does this event rank against Areazine's other recorded earthquakes? ▾
This is the #969 strongest of the 1,782 earthquake reports in Areazine's archive by magnitude, stronger than 44% of them and weaker than 968 others.
Was Nikolski likely to feel this earthquake? ▾
This event was centered 167 km WSW of Nikolski. Shaking intensity falls off sharply with distance from the epicenter and depends on depth and local geology, so check the USGS "Did You Feel It?" report for this event for real felt-shaking data rather than assuming from magnitude and distance alone.

Where this data comes from

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AirNow (EPA / NOAA)

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National Weather Service

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CDC Air Quality & Health

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