Earthquake · automatic estimate, may change
M 2.1ml
26 km SSE of Chickaloon, Alaska
- When
- Magnitude
- M 2.1 (ml)
- Depth
- 11 km below the surface
- Felt
- 2 reports · strongest reported intensity I
- Nearest
- Anchorage Municipality, 71 km SW
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 16 hours ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.
How big was it?
This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
- Magna, Utah 2020 M 5.7 250,000× the energy of this one
- Around the size people start to feel M 3.0 22× the energy of this one
- This earthquake M 2.1 about 43 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.
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 | 2 | |
| longitude | -148.26 | -148.25 | |
| latitude | 61.58 | 61.58 | |
| depth | 12.5 | 11.2 | |
| magnitude | 1.8 | 2.1 | |
| location | 25 km SSE of Chickaloon, Alaska | 26 km SSE of Chickaloon, Alaska | |
| longitude | -148.26 | -148.26 | |
| latitude | 61.59 | 61.58 | |
| depth | 17.7 | 12.5 |
Where
Epicentre 61.5800, -148.2480. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Anchorage Municipality, AK | 71 km (44 mi) | NE of here | earthquakes near Anchorage Municipality |
| Matanuska-Susitna Borough, AK | 101 km (63 mi) | SE of here | earthquakes near Matanuska-Susitna Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
1 earthquake has 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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.6 on 2018-01-27 — it released about 5,600 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.