Earthquake · automatic estimate, may change
M 1.7ml
Earthquake near Fishhook, AK
No earthquake was likely felt in Fishhook in the 24 hours to 11:36 am AKST (20:36 UTC). The last one was M 4.4, 118 km (73 mi) E, at 11:11 am AKDT on 30 October 2026, estimated intensity II (weak) in town; 54 felt reports to USGS. Every earthquake near Fishhook
This page: a magnitude 1.7 earthquake was recorded 49 km (31 mi) east-northeast of Fishhook, AK, at 3:57 pm AKDT on 26 September 2025 (23:57 UTC), 1.1 km deep. The magnitude and location are an automatic first estimate and may change.
USGS: 16 km NNE of Chickaloon, Alaska
- When
- 3:57 pm AKDT on 26 September 2025 ()
- Where
- 49 km (31 mi) east-northeast of Fishhook, AK · earthquakes near Fishhook
- Magnitude
- M 1.7 (ml)
- Depth
- 1.1 km below the surface
- Felt
- no reports yet
- Nearest
- Matanuska-Susitna Borough, 68 km WNW
- Nearest mapped fault
- Castle Mountain fault, 8 km from its surface trace — near is not the same as on
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 413 days ago
Earthquake alerts for Fishhook, AK
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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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 12 km (7 mi) from the epicentre. In Fishhook, 49 km away, the estimate is intensity I (not felt). 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 89× the energy of this one
- This earthquake M 1.7 about 11 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 4.6 on 2018-01-27 — about 22,000 times the energy of this one.
Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:
- 5.9 15 km N of Glacier View, Alaska · 37 km E of this epicentre
- 5.8 14 km NNE of Fishhook, Alaska · 38 km WSW of this epicentre
- 5.3 55 km NNE of Chickaloon, Alaska · 39 km NNE of this epicentre
- 5.0 4 km N of Chickaloon, Alaska · 12 km SSW 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 61.9424, -148.3963. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Matanuska-Susitna Borough, AK | 68 km (42 mi) | WNW | earthquakes near Matanuska-Susitna Borough |
| Anchorage Municipality, AK | 98 km (61 mi) | SSW | earthquakes near Anchorage Municipality |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 1.5 28 km S of Chickaloon, Alaska
- 2.0 42 km NNW of Chickaloon, Alaska
- 2.2 57 km N of Chickaloon, Alaska
- 1.7 12 km ESE of Chickaloon, Alaska
- 1.9 30 km N of Sutton-Alpine, Alaska
- 2.4 35 km NNW of Glacier View, Alaska
- 2.6 66 km N of Chickaloon, Alaska
- 1.8 42 km NNW of Glacier View, Alaska
- 1.8 24 km SE of Chickaloon, Alaska
- 2.2 13 km NNE of Sutton-Alpine, Alaska
- 1.8 29 km N of Chickaloon, Alaska
- 1.5 31 km SSE of Chickaloon, Alaska
- 2.3 38 km NNE of Chickaloon, Alaska
- 1.8 58 km N of Chickaloon, Alaska
- 2.0 38 km N of Sutton-Alpine, Alaska
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.
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.