Earthquake · automatic estimate, may change
M 2.3ml
Earthquake near Susitna North, AK
USGS: 9 km SSE of Talkeetna, Alaska
- When
- 7:03 pm AKDT on 28 September 2026 ()
- Where
- 14 km (9 mi) NW of Susitna North, AK · earthquakes near Susitna North
- Magnitude
- M 2.3 (ml)
- Depth
- 63 km below the surface
- Felt
- 1 report · strongest reported intensity I
- Nearest
- Matanuska-Susitna Borough, 29 km E
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 4 days ago
A magnitude 2.3 earthquake was recorded 14 km (9 mi) NW of Susitna North, AK, at 7:03 pm AKDT on 28 September 2026 (03:03 UTC). 1 person has reported feeling it to USGS. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
- Magna, Utah 2020 M 5.7 130,000× the energy of this one
- Around the size people start to feel M 3.0 11× the energy of this one
- This earthquake M 2.3 about 85 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 2020-11-26 — about 2,800 times the energy of this one.
Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:
- 5.9 23 km NE of Willow, Alaska · 41 km SSE of this epicentre
- 5.8 37 km ENE of Susitna North, Alaska · 46 km E of this epicentre
- 5.4 25 km NNW of Willow, Alaska · 30 km S of this epicentre
- 5.4 36 km E of Skwentna, Alaska · 47 km SW of this epicentre
- 5.1 21 km SSE of Susitna North, Alaska · 35 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 62.2400, -150.0690. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Matanuska-Susitna Borough, AK | 29 km (18 mi) | E | earthquakes near Matanuska-Susitna Borough |
| Anchorage Municipality, AK | 126 km (78 mi) | SSE | earthquakes near Anchorage Municipality |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
3 earthquakes have been recorded within 50 km since this one.
- 1.7 31 km WNW of Willow, Alaska
- 1.4 9 km W of Susitna North, Alaska
- 2.0 11 km W of Trapper Creek, 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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| reported intensity | not reported | 1 | |
| felt reports | not reported | 1 | |
| location | 9 km S of Talkeetna, Alaska | 9 km SSE of Talkeetna, Alaska | |
| longitude | -150.07 | -150.07 | |
| latitude | 62.24 | 62.24 | |
| depth | 62.2 | 62.6 | |
| magnitude | 2.2 | 2.3 | |
| location | 11 km SSE of Talkeetna, Alaska | 9 km S of Talkeetna, Alaska | |
| longitude | -150.04 | -150.07 | |
| latitude | 62.23 | 62.24 | |
| depth | 63.7 | 62.2 | |
| magnitude | 2.1 | 2.2 |
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.