Earthquake · reviewed by a seismologist
M 4.5ml
65 km SSE of Cantwell, Alaska
- When
- Magnitude
- M 4.5 (ml)
- Depth
- 75 km below the surface
- Felt
- 320 reports · strongest reported intensity IV
- Measured shaking
- intensity III (ShakeMap)
- USGS impact alert
- green
- Nearest
- Matanuska-Susitna Borough, 92 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2450 days ago
This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 320 people have reported feeling it to USGS.
How big was it?
This earthquake released about 85 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.5 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 2,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 89× the energy of this one
- Magna, Utah 2020 M 5.7 63× the energy of this one
- This earthquake M 4.5 about 85 tons of TNT
- Around the size people start to feel M 3.0 this one released 180× more
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 62.8799, -148.3023. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Matanuska-Susitna Borough, AK | 92 km (57 mi) | NE of here | earthquakes near Matanuska-Susitna Borough |
| Denali Borough, AK | 124 km (77 mi) | SE of here | earthquakes near Denali Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 1.6 67 km SSE of Cantwell, Alaska
- 1.9 51 km SSE of Cantwell, Alaska
- 1.6 73 km N of Chickaloon, Alaska
- 2.0 59 km SSE of Cantwell, Alaska
- 1.5 65 km SSE of Cantwell, Alaska
- 1.5 65 km SSE of Cantwell, Alaska
- 1.6 59 km SE of Cantwell, Alaska
- 1.6 60 km S of Cantwell, Alaska
- 2.3 61 km SSE of Cantwell, Alaska
- 1.8 48 km SSE of Cantwell, Alaska
- 2.5 86 km SSE of Cantwell, Alaska
- 2.8 19 km SSE of Cantwell, Alaska
- 1.5 37 km SE of Cantwell, Alaska
- 1.8 77 km N of Chickaloon, Alaska
- 1.9 16 km SSE of Cantwell, 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.