Earthquake · reviewed by a seismologist
M 4.5mwr
81 km SSE of Akutan, Alaska
Yes. A magnitude 4.5 earthquake was recorded 81 km SSE of Akutan, Alaska, at 12:33 am AKDT on 24 October 2026 (08:33 UTC), 35 km deep. 3 people have reported feeling it to USGS.
- When
- Magnitude
- M 4.5 (mwr)
- Depth
- 35 km below the surface
- Felt
- 3 reports · strongest reported intensity III
- Measured shaking
- intensity III (ShakeMap)
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1 hour ago
Earthquake alerts for Akutan, AK
Get a notification in this browser when USGS records an earthquake near Akutan, AK. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.
At this magnitude and depth, people at rest would likely notice it out to about 135 km (84 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
How big was it?
This earthquake released about 85 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.5 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 2,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 89× the energy of this one
- Magna, Utah 2020 M 5.7 63× the energy of this one
- This earthquake M 4.5 about 85 tons of TNT
- Around the size people start to feel M 3.0 this one released 180× more
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 5.5 on 2026-04-25 — about 32 times the energy of this one.
Before 2016, the USGS record lists 35 earthquakes of M5 or more within 50 km; the five largest:
- 6.6 92 km SE of Akutan, Alaska · 33 km ENE of this epicentre
- 6.5 59 km ESE of Akutan, Alaska · 45 km NNE of this epicentre
- 6.5 83 km SE of Akutan, Alaska · 33 km NE of this epicentre
- 6.5 81 km ESE of Akutan, Alaska · 42 km NE of this epicentre
- 6.4 50 km SE of Akutan, Alaska · 35 km NNW 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 53.5186, -165.0962. Map © OpenStreetMap contributors.
Aftershocks so far
No further earthquakes have been recorded within 50 km since this one.
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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| measured intensity | 3.35 | 3.35 | |
| reported intensity | not reported | 3.1 | |
| felt reports | not reported | 3 |
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.