Earthquake.now

M3.9 Earthquake near Nikolski, United States — 05 November 2026

A minor earthquake of magnitude 3.9 was recorded near Nikolski, United States on , with an epicentre 119 km southwest of Nikolski, at a focal depth of 20.1 km. It ranked as the 52nd strongest of 6271 earthquakes recorded in the United States in the preceding 30 days.

3.9 Minor

Time (UTC): 2026-11-05 08:59:29

Time (your timezone): —

Magnitude: 3.9 (minor)

Focal depth: 20.1 km (shallow)

Epicentre: 52.1520, -170.0670

Location: 119 km SW of Nikolski, Alaska

Country: United States

USGS link to NOAA tsunami information: Not linked

Review status: Reviewed

Source: USGS event page

How strong was this earthquake?

Minor earthquakes in this range are felt by people close to the epicentre as a brief jolt or rattle, but they very rarely cause any damage.

A magnitude 3.9 earthquake radiates roughly 11 tons of TNT equivalent in seismic energy.

The USGS assigns this earthquake a significance score of 234, which is below the USGS threshold of more than 600 for its significant-earthquake list. The ranking combines magnitude with available Did You Feel It responses and PAGER alert level; it is not a direct measurement of damage.

What the magnitude scale actually measures →

When it happened locally

That is about 21:39 local solar time at the epicentre, late at night.

This event was deeper than 85% of the 167,074 earthquakes recorded in the United States in our catalogue and stronger than 99% of them.

Where was the epicentre?

The epicentre was located at 52.1520, -170.0670 — 119 km southwest of Nikolski. The closest other recorded event was a magnitude 3.5 earthquake 9 km north-northwest of here on 05 November 2026.

The nearest other settlements in our records are Atka (149 km south-southwest), Nikolski (173 km south) and Dutch Harbor (238 km north-northeast).

Why the 20 km depth matters

At 20 km this was a shallow earthquake. Shallow events release their energy close to the surface, so for a given magnitude they produce noticeably stronger shaking — and more damage — than deeper ones. Roughly three quarters of all earthquakes worldwide occur at shallow depths.

This catalogue does not ingest eyewitness responses, so it cannot confirm where this earthquake was felt. Based on magnitude alone, an event this size may be noticed locally, especially close to the epicentre. Its shallow focus makes stronger surface shaking more likely than for a deeper event of the same magnitude.

Read more on how focal depth changes what you feel →

What does the tsunami information flag mean?

The USGS record does not carry a link to NOAA tsunami information. That field is not an all-clear and does not state whether a tsunami occurred. In this case, a damaging tsunami would be less likely because at M3.9 it falls below the magnitude 6.5 threshold that generally applies before a submarine earthquake displaces enough water to generate a damaging tsunami; it occurred inland rather than beneath the sea floor. For an active coastal alert, use tsunami.gov or your local warning authority.

How earthquakes generate tsunamis, and what the alert levels mean →

Aftershocks and local seismic history

2 further earthquakes have been recorded within about 150 km of the epicentre in the 10 hours since this event, the largest of them magnitude 3.8.

163 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 6.5 event near Nikolski on 17 September 2026. This M3.9 event released about 7,943 times less energy than that event.

1030 earthquakes have been recorded within 100 km of this epicentre in the past year, 57 of them in the past 30 days.

How long aftershock sequences last, and how large they get →

Where this event sits in the record

This earthquake is part of the November 2026 worldwide record, and of earthquakes in the United States during November 2026. Browse the full monthly archive to compare periods.

Nearest recorded earthquakes to this epicentre

Other recent earthquakes in the United States

All recorded earthquakes in the United States →

Other magnitude 3 earthquakes worldwide

All magnitude 3 earthquakes →

Questions about this earthquake

How strong was the earthquake near Nikolski?

It measured magnitude 3.9 — a minor earthquake. A magnitude 3.9 earthquake radiates roughly 11 tons of TNT equivalent in seismic energy.

How deep was the earthquake near Nikolski?

The focus was 20 km below the surface, which counts as shallow.

Was the Nikolski earthquake felt at the surface?

At magnitude 3.9 and a focal depth of 20 km, shaking would have been concentrated near the epicentre.

When did the earthquake near Nikolski happen?

05 November 2026 at 08:59 UTC.

Was there a tsunami?

No. The USGS record carries no tsunami-information link for this event.

Have there been aftershocks?

2 further earthquakes have been recorded within about 150 km of the epicentre in the 10 hours since this event, the largest of them magnitude 3.8.

How often do earthquakes happen near Nikolski?

163 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 6.5 event near Nikolski on 17 September 2026. This M3.9 event released about 7,943 times less energy than that event.