Earthquake · automatic estimate, may change
M 2.1ml
13 km SSE of Portage Creek, Alaska
- When
- Magnitude
- M 2.1 (ml)
- Depth
- 2.5 km below the surface
- Felt
- no reports yet
- Nearest
- Bristol Bay Borough, 39 km E
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 5 hours ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
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 |
|---|---|---|---|
| location | 11 km SSE of Portage Creek, Alaska | 13 km SSE of Portage Creek, Alaska | |
| longitude | -157.64 | -157.66 | |
| latitude | 58.81 | 58.79 | |
| depth | 6.8 | 2.5 | |
| magnitude | 1.9 | 2.1 |
Where
Epicentre 58.7910, -157.6570. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Bristol Bay Borough, AK | 39 km (24 mi) | W of here | earthquakes near Bristol Bay Borough |
| Dillingham Census Area, AK | 91 km (56 mi) | SSE of here | earthquakes near Dillingham Census Area |
| Lake and Peninsula Borough, AK | 105 km (65 mi) | NW 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
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.
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.