Earthquake · automatic estimate, may change
M 0.9ml
Earthquake near Sutton-Alpine, AK
USGS: 17 km ENE of Chickaloon, Alaska
- When
- 10:11 pm AKDT on 27 September 2026 ()
- Where
- 42 km (26 mi) ENE of Sutton-Alpine, AK · earthquakes near Sutton-Alpine
- Magnitude
- M 0.9 (ml)
- Depth
- 19 km below the surface
- Felt
- no reports yet
- Nearest
- Matanuska-Susitna Borough, 84 km WNW
- Nearest mapped fault
- Castle Mountain fault, under 1 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 5 days ago
A magnitude 0.9 earthquake was recorded 42 km (26 mi) ENE of Sutton-Alpine, AK, at 10:11 pm AKDT on 27 September 2026 (06:11 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 0.68 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 1.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 22,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 16,000,000× the energy of this one
- Around the size people start to feel M 3.0 1,400× the energy of this one
- This earthquake M 0.9 about 0.68 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 350,000 times the energy of this one.
Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:
- 6.8 31 km SSW of Glacier View, Alaska · 41 km SSE of this epicentre
- 6.4 23 km S of Glacier View, Alaska · 38 km SE of this epicentre
- 5.9 15 km N of Glacier View, Alaska · 26 km ENE of this epicentre
- 5.3 55 km NNE of Chickaloon, Alaska · 47 km N of this epicentre
- 5.1 23 km S of Glacier View, Alaska · 40 km SE 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 61.8520, -148.1460. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Matanuska-Susitna Borough, AK | 84 km (52 mi) | WNW | earthquakes near Matanuska-Susitna Borough |
| Anchorage Municipality, AK | 97 km (60 mi) | SW | earthquakes near Anchorage Municipality |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 2.2 24 km N of Chickaloon, Alaska
- 1.9 30 km NNE of Chickaloon, Alaska
- 3.1 26 km N of Glacier View, Alaska
- 1.6 45 km NNW of Chickaloon, Alaska
- 1.3 12 km WNW of Glacier View, Alaska
- 2.1 25 km SE of Chickaloon, 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.