Earthquake · automatic estimate, may change
M 3.1ml
45 km E of Pedro Bay, Alaska
- When
- Magnitude
- M 3.1 (ml)
- Depth
- 139 km below the surface
- Felt
- no reports yet
- Nearest
- Kenai Peninsula Borough, 82 km NE
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 56 minutes 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 250,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
- Magna, Utah 2020 M 5.7 7,900× the energy of this one
- This earthquake M 3.1 about 1,300 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.4× 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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| location | 44 km E of Pedro Bay, Alaska | 45 km E of Pedro Bay, Alaska | |
| longitude | -153.31 | -153.3 | |
| latitude | 59.81 | 59.82 | |
| depth | 140.1 | 139 | |
| magnitude | 2.9 | 3.1 | |
| magnitude | 2.8 | 2.9 | |
| location | 37 km E of Pedro Bay, Alaska | 44 km E of Pedro Bay, Alaska | |
| longitude | -153.45 | -153.31 | |
| latitude | 59.84 | 59.81 | |
| depth | 138.4 | 140.1 | |
| magnitude | 2.6 | 2.8 |
Where
Epicentre 59.8160, -153.3030. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Kenai Peninsula Borough, AK | 82 km (51 mi) | SW of here | earthquakes near Kenai Peninsula Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
No further earthquakes have 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 7.1 on 2016-01-24 — it released about 1,000,000 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.