Earthquake · automatic estimate, may change
M 1.9ml
78 km W of Karluk, Alaska
- When
- Magnitude
- M 1.9 (ml)
- Depth
- 6.4 km below the surface
- Felt
- no reports yet
- Nearest
- Lake and Peninsula Borough, 66 km NW
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 3 hours ago
A magnitude 1.9 earthquake was recorded 78 km W of Karluk, Alaska at 17:43 UTC on 2026-10-05. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
- Magna, Utah 2020 M 5.7 500,000× the energy of this one
- Around the size people start to feel M 3.0 45× the energy of this one
- This earthquake M 1.9 about 21 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 2018-05-11 — about 130,000 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 · 42 km WSW of this epicentre
- 5.2 55 km WSW of Karluk, Alaska · 36 km SE of this epicentre
- 5.2 67 km ESE of Egegik, Alaska · 49 km NW of this epicentre
- 5.0 54 km WNW of Karluk, Alaska · 29 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 57.6170, -155.7730. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake and Peninsula Borough, AK | 66 km (41 mi) | NW | earthquakes near Lake and Peninsula Borough |
| Kodiak Island Borough, AK | 111 km (69 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
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 |
|---|---|---|---|
| longitude | -155.77 | -155.77 | |
| latitude | 57.63 | 57.62 | |
| depth | 5.8 | 6.4 | |
| magnitude | 1.8 | 1.9 |
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.