Earthquake · automatic estimate, may change
M 3.1ml
48 km ESE of Halibut Cove, Alaska
Yes. A magnitude 3.1 earthquake was recorded 48 km ESE of Halibut Cove, Alaska, at 11:23 am AKDT on 17 October 2026 (19:23 UTC), 26 km deep. The magnitude and location are an automatic first estimate and may change.
- When
- Magnitude
- M 3.1 (ml)
- Depth
- 26 km below the surface
- Felt
- no reports yet
- Nearest
- Kenai Peninsula Borough, 144 km NW
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 29 hours ago
Earthquake alerts for Fritz Creek, AK
Get a notification in this browser when USGS records an earthquake near Fritz Creek, 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, people at rest would likely notice it out to about 32 km (20 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 250,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
- Magna, Utah 2020 M 5.7 7,900× the energy of this one
- This earthquake M 3.1 about 1,300 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.4× 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 5.4 on 2025-10-30 — about 2,800 times the energy of this one.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 6.2 43 km ESE of Halibut Cove, Alaska · 17 km SW of this epicentre
- 6.0 6 km SSE of Fox River, Alaska · 44 km NW of this epicentre
- 5.6 7 km SE of Fritz Creek, Alaska · 50 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 59.5110, -150.3920. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kenai Peninsula Borough, AK | 144 km (89 mi) | NW | earthquakes near Kenai Peninsula 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 |
|---|---|---|---|
| location | 47 km ESE of Halibut Cove, Alaska | 48 km ESE of Halibut Cove, Alaska | |
| longitude | -150.4 | -150.39 | |
| latitude | 59.51 | 59.51 | |
| depth | 26.7 | 26.3 | |
| location | 16 km SW of Anchor Point, Alaska | 47 km ESE of Halibut Cove, Alaska | |
| longitude | -152.07 | -150.4 | |
| latitude | 59.69 | 59.51 | |
| depth | 54.7 | 26.7 | |
| magnitude | 2.3 | 3.1 | |
| location | 15 km WSW of Anchor Point, Alaska | 16 km SW of Anchor Point, Alaska | |
| longitude | -152.08 | -152.07 | |
| latitude | 59.72 | 59.69 |
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.