QuakeIndex

Earthquake · reviewed by a seismologist

M 0.0ml

Earthquake near Dutch Harbor, AK

USGS: 8 km NNW of Dutch Harbor, Alaska

3:38 pm AKDT, Sep 28, 2026 · · 9.0 km deep · released about 0.032 lb of TNT

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Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
3:38 pm AKDT on 28 September 2026 ()
Where
9 km (5 mi) NNW of Dutch Harbor, AK · earthquakes near Dutch Harbor
Magnitude
M 0.0 (ml)
Depth
9.0 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 4 days ago

A magnitude 0.0 earthquake was recorded 9 km (5 mi) NNW of Dutch Harbor, AK, at 3:38 pm AKDT on 28 September 2026 (23:38 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 0.032 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 1.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 470,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 330,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 30,000× the energy of this one
  4. This earthquake M 0.0 about 0.032 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 83,000,000 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 · 45 km SE of this epicentre
  2. 5.9 27 km WNW of Dutch Harbor, Alaska · 21 km W of this epicentre
  3. 5.9 13 km NE of Dutch Harbor, Alaska · 14 km E of this epicentre
  4. 5.4 48 km WSW of Unalaska, Alaska · 48 km WSW of this epicentre
  5. 5.4 26 km WSW of Dutch Harbor, Alaska · 26 km SW of this epicentre

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 53.9558, -166.6100. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 0.6 6 km NW of Dutch Harbor, Alaska
  2. 0.7 7 km NNW of Dutch Harbor, Alaska
  3. 0.3 36 km SW of Unalaska, Alaska
  4. 0.1 7 km NW of Dutch Harbor, Alaska
  5. -0.0 6 km NW of Dutch Harbor, Alaska
  6. 0.5 7 km WNW of Dutch Harbor, Alaska
  7. 0.4 9 km NW of Dutch Harbor, Alaska
  8. 0.3 8 km NW of Dutch Harbor, Alaska
  9. 0.1 7 km NW of Dutch Harbor, Alaska
  10. 0.1 7 km NW of Dutch Harbor, Alaska
  11. 0.6 6 km NNW of Dutch Harbor, Alaska
  12. 0.1 8 km NW of Dutch Harbor, Alaska
  13. 1.3 6 km NNW of Dutch Harbor, Alaska
  14. 0.7 6 km NNW of Dutch Harbor, Alaska

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

On USGS

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