QuakeIndex

Earthquake · reviewed by a seismologist

M 0.3ml

Earthquake near Akutan, AK

USGS: 17 km WSW of Akutan, Alaska

4:45 am AKDT, Sep 28, 2026 · · 15 km deep · released about 0.082 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
4:45 am AKDT on 28 September 2026 ()
Where
17 km (11 mi) WSW of Akutan, AK · earthquakes near Akutan
Magnitude
M 0.3 (ml)
Depth
15 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 0.3 earthquake was recorded 17 km (11 mi) WSW of Akutan, AK, at 4:45 am AKDT on 28 September 2026 (12:45 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 0.082 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 1.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 12,000× the energy of this one
  4. This earthquake M 0.3 about 0.082 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 5.4 on 2019-09-14 — about 46,000,000 times the energy of this one.

Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.1 39 km S of Akutan, Alaska · 35 km SSE of this epicentre
  2. 6.3 23 km NE of Akutan, Alaska · 39 km NE of this epicentre
  3. 6.2 36 km ESE of Unalaska, Alaska · 39 km S of this epicentre
  4. 5.9 13 km NE of Dutch Harbor, Alaska · 27 km WSW of this epicentre
  5. 5.6 35 km SE of Akutan, Alaska · 43 km ESE 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 54.0637, -166.0062. Map © OpenStreetMap contributors.

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 0.8 13 km W of Akutan, 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.