Earthquake · automatic estimate, may change
M 1.5ml
Earthquake near Elmendorf Air Force Base, AK
USGS: 8 km SSE of Elmendorf Air Force Base, Alaska
18 km (11 mi) E of Anchorage, AK
- When
- 7:56 am AKDT on 28 September 2026 ()
- Where
- 8 km (5 mi) SSE of Elmendorf Air Force Base, AK · earthquakes near Elmendorf Air Force Base
- Magnitude
- M 1.5 (ml)
- Depth
- 26 km below the surface
- Felt
- no reports yet
- Nearest
- Anchorage Municipality, 15 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 1.5 earthquake was recorded 8 km (5 mi) SSE of Elmendorf Air Force Base, AK, at 7:56 am AKDT on 28 September 2026 (15:56 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Eagle River, Anchorage.
How big was it?
This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
- Around the size people start to feel M 3.0 180× the energy of this one
- This earthquake M 1.5 about 5.4 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 7.1 on 2018-11-30 — about 250,000,000 times the energy of this one.
Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:
- 5.7 13 km S of Girdwood, Alaska · 46 km SSE of this epicentre
- 5.5 2 km ENE of Eagle River, Alaska · 15 km N of this epicentre
- 5.5 26 km SSW of Anchorage, Alaska · 37 km SW of this epicentre
- 5.3 8 km NW of Knik-Fairview, Alaska · 42 km NNW of this epicentre
- 5.3 13 km ESE of Eagle River, Alaska · 17 km NE 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 61.1920, -149.5600. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Anchorage Municipality, AK | 15 km (9 mi) | E | earthquakes near Anchorage Municipality |
| Matanuska-Susitna Borough, AK | 119 km (74 mi) | N | earthquakes near Matanuska-Susitna Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
2 earthquakes have 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.
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.