Earthquake · reviewed by a seismologist
M 4.6mb
Rat Islands, Aleutian Islands, Alaska
- When
- Magnitude
- M 4.6 (mb)
- Depth
- 47 km below the surface
- Felt
- no reports yet
- Measured shaking
- intensity III (ShakeMap)
- Nearest
- Aleutians West Census Area, 118 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 52 minutes ago
This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.
How big was it?
This earthquake released about 120 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.6 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 1,400× the energy of this one
- Mineral, Virginia 2011 M 5.8 63× the energy of this one
- Magna, Utah 2020 M 5.7 45× the energy of this one
- This earthquake M 4.6 about 120 tons of TNT
- Around the size people start to feel M 3.0 this one released 250× 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 50.9044, 179.3215. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Aleutians West Census Area, AK | 118 km (73 mi) | S of here | earthquakes near Aleutians West Census Area |
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 4.4 on 2026-09-26.
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.