Earthquake · automatic estimate, may change
M 3.4ml
83 km W of Karluk, Alaska
- When
- Magnitude
- M 3.4 (ml)
- Depth
- 5.0 km below the surface
- Felt
- no reports yet
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Lake and Peninsula Borough, 61 km NNW
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 3 hours ago
A magnitude 3.4 earthquake was recorded 83 km W of Karluk, Alaska at 16:55 UTC on 2026-10-05. This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
How big was it?
This earthquake released about 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 89,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,800× the energy of this one
- This earthquake M 3.4 about 1.9 tons of TNT
- Around the size people start to feel M 3.0 this one released 4× 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 5.3 on 2018-05-11 — about 710 times the energy of this one.
Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:
- 5.4 60 km E of Ugashik, Alaska · 40 km SW of this epicentre
- 5.2 55 km WSW of Karluk, Alaska · 42 km SE of this epicentre
- 5.2 67 km ESE of Egegik, Alaska · 43 km NW of this epicentre
- 5.0 54 km WNW of Karluk, Alaska · 32 km ENE 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 57.6500, -155.8490. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake and Peninsula Borough, AK | 61 km (38 mi) | NNW | earthquakes near Lake and Peninsula Borough |
| Kodiak Island Borough, AK | 115 km (71 mi) | E | earthquakes near Kodiak Island Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
2 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 | 3.81 | 3.81 | |
| measured intensity | 4.07 | 3.81 | |
| latitude | 57.64 | 57.65 | |
| longitude | -155.84 | -155.85 | |
| latitude | 57.64 | 57.64 | |
| measured intensity | not reported | 4.07 | |
| location | 81 km W of Karluk, Alaska | 83 km W of Karluk, Alaska | |
| longitude | -155.81 | -155.84 | |
| latitude | 57.63 | 57.64 | |
| depth | 4.3 | 5 | |
| magnitude | 3.5 | 3.4 |
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.