Earthquake near Dutch Harbor, AK

A magnitude 0.5 earthquake was recorded 7 km (5 mi) WNW of Dutch Harbor, AK, at 10:36 am AKDT on 29 September 2026 (18:36 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Unalaska.

How big was it?

This earthquake released about 0.17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 1.5 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 89,000,000× the energy of this one
2. Magna, Utah 2020 M 5.7 63,000,000× the energy of this one
3. Around the size people start to feel M 3.0 5,600× the energy of this one
4. This earthquake M 0.5 about 0.17 lb of TNT

Energy from the Gutenberg–Richter relation (log₁₀E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 5.3 on 2025-07-27 — about 16,000,000 times the energy of this one.

Before 2016, the USGS record lists 13 earthquakes of M5 or more within 50 km; the five largest:

1. 6.2 36 km ESE of Unalaska, Alaska · 44 km ESE of this epicentre Dec 9, 1942
2. 6.0 51 km SW of Unalaska, Alaska · 48 km SW of this epicentre Jul 19, 1986
3. 5.9 27 km WNW of Dutch Harbor, Alaska · 20 km WNW of this epicentre Apr 21, 1972
4. 5.9 13 km NE of Dutch Harbor, Alaska · 18 km ENE of this epicentre Sep 1, 2006
5. 5.4 48 km WSW of Unalaska, Alaska · 43 km WSW of this epicentre Oct 19, 1991

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 53.9062, -166.6503. Map © OpenStreetMap contributors.

Aftershocks so far

5 earthquakes have been recorded within 50 km since this one.

1. 0.6 6 km NW of Dutch Harbor, Alaska 11:21 UTC
2. 0.7 7 km NNW of Dutch Harbor, Alaska 11:21 UTC
3. 0.3 36 km SW of Unalaska, Alaska 06:41 UTC
4. 0.1 7 km NW of Dutch Harbor, Alaska 23:56 UTC
5. -0.0 6 km NW of Dutch Harbor, Alaska 07:17 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 01:04 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

• The official USGS event page — the source of record for every value above
• Did you feel it? Report it to USGS — reports go to USGS, not to us
• ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.