Earthquake · reviewed by a seismologist
M 2.5ml
25 km SW of Trapper Creek, Alaska
- When
- Magnitude
- M 2.5 (ml)
- Depth
- 9.7 km below the surface
- Felt
- 2 reports · strongest reported intensity IV
- Nearest
- Matanuska-Susitna Borough, 58 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 652 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.
How big was it?
This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
- Magna, Utah 2020 M 5.7 63,000× the energy of this one
- Around the size people start to feel M 3.0 5.6× the energy of this one
- This earthquake M 2.5 about 170 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.
Where
Epicentre 62.1767, -150.6106. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Matanuska-Susitna Borough, AK | 58 km (36 mi) | W of here | earthquakes near Matanuska-Susitna Borough |
| Anchorage Municipality, AK | 132 km (82 mi) | NNW of here | earthquakes near Anchorage Municipality |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
54 earthquakes have been recorded within 50 km since this one.
- 1.6 28 km SSW of Petersville, Alaska
- 1.5 22 km ENE of Skwentna, Alaska
- 1.5 34 km NNW of Susitna, Alaska
- 1.7 16 km ESE of Skwentna, Alaska
- 1.8 29 km NNE of Skwentna, Alaska
- 1.8 21 km SE of Skwentna, Alaska
- 2.4 38 km SSW of Trapper Creek, Alaska
- 1.9 28 km SSW of Petersville, Alaska
- 1.9 35 km ENE of Skwentna, Alaska
- 2.3 29 km NNW of Susitna, Alaska
- 1.5 34 km WSW of Trapper Creek, Alaska
- 1.7 36 km ENE of Skwentna, Alaska
- 2.0 35 km SW of Trapper Creek, Alaska
- 1.6 25 km ENE of Skwentna, Alaska
- 1.5 21 km E of Skwentna, 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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.5 on 2016-01-18 — it released about 1,000 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.