Earthquake · reviewed by a seismologist
M 2.8ml
22 km N of Larsen Bay, Alaska
Yes. A magnitude 2.8 earthquake was recorded 22 km N of Larsen Bay, Alaska, at 8:05 pm AKDT on 17 October 2026 (04:05 UTC), 29 km deep.
- When
- Magnitude
- M 2.8 (ml)
- Depth
- 29 km below the surface
- Felt
- no reports yet
- Nearest
- Kodiak Island Borough, 6 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3 days ago
Earthquake alerts for Kodiak Station, AK
Get a notification in this browser when USGS records an earthquake near Kodiak Station, 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. 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 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
- Magna, Utah 2020 M 5.7 22,000× the energy of this one
- Around the size people start to feel M 3.0 2× the energy of this one
- This earthquake M 2.8 about 480 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 4.9 on 2021-01-03 — about 1,400 times the energy of this one.
Before 2016, the USGS record lists 13 earthquakes of M5 or more within 50 km; the five largest:
- 7.1 4 km ENE of Karluk, Alaska · 28 km SW of this epicentre
- 7.0 26 km SSE of Karluk, Alaska · 49 km SSW of this epicentre
- 6.5 24 km SSW of Larsen Bay, Alaska · 44 km SSW of this epicentre
- 6.0 15 km S of Larsen Bay, Alaska · 37 km S of this epicentre
- 5.8 29 km NNE of Karluk, Alaska · 16 km WNW 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 57.7380, -153.9980. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kodiak Island Borough, AK | 6 km (4 mi) | SE | earthquakes near Kodiak Island Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
1 earthquake has 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 |
|---|---|---|---|
| review status | automatic | reviewed | |
| location | 21 km N of Larsen Bay, Alaska | 22 km N of Larsen Bay, Alaska | |
| longitude | -153.99 | -154 | |
| latitude | 57.73 | 57.74 | |
| depth | 28.7 | 29.1 | |
| longitude | -153.99 | -153.99 | |
| longitude | -154 | -153.99 | |
| latitude | 57.73 | 57.73 | |
| depth | 27.7 | 28.7 | |
| magnitude | 2.7 | 2.8 | |
| longitude | -154.01 | -154 | |
| latitude | 57.73 | 57.73 |
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.