Earthquake · reviewed by a seismologist
M 2.5ml
47 km SW of Karluk, Alaska
- When
- Magnitude
- M 2.5 (ml)
- Depth
- 25 km below the surface
- Felt
- no reports yet
- Nearest
- Kodiak Island Borough, 80 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 206 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
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 57.2210, -154.9180. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Kodiak Island Borough, AK | 80 km (50 mi) | SW of here | earthquakes near Kodiak Island Borough |
| Lake and Peninsula Borough, AK | 133 km (83 mi) | SE of here | earthquakes near Lake and Peninsula Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 1.7 57 km WNW of Akhiok, Alaska
- 1.8 59 km WSW of Karluk, Alaska
- 1.9 53 km W of Akhiok, Alaska
- 1.5 65 km SW of Karluk, Alaska
- 1.8 45 km W of Karluk, Alaska
- 2.4 63 km WNW of Akhiok, Alaska
- 2.4 24 km WSW of Karluk, Alaska
- 2.3 63 km WSW of Karluk, Alaska
- 1.8 38 km SSW of Karluk, Alaska
- 1.8 39 km SW of Karluk, Alaska
- 1.8 11 km S of Karluk, Alaska
- 1.8 5 km WNW of Karluk, Alaska
- 1.9 52 km WNW of Akhiok, Alaska
- 2.9 35 km SSW of Karluk, Alaska
- 2.1 62 km W of Akhiok, 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 5.3 on 2021-02-13 — it released about 16,000 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.