Earthquake · automatic estimate, may change
M 2.1ml
Earthquake near Seward, AK
No earthquake was likely felt in Seward in the 24 hours to 9:27 am AKST (18:27 UTC). The last one was M 4.3, 83 km (52 mi) W, at 2:30 am AKST on 1 November 2026, estimated intensity II (weak) in town; 115 felt reports to USGS. Every earthquake near Seward
This page: a magnitude 2.1 earthquake was recorded 50 km (31 mi) east-northeast of Seward, AK, at 11:06 pm AKDT on 11 October 2025 (07:06 UTC), 17 km deep. The magnitude and location are an automatic first estimate and may change.
USGS: 38 km E of Primrose, Alaska
- When
- 11:06 pm AKDT on 11 October 2025 ()
- Where
- 50 km (31 mi) east-northeast of Seward, AK · earthquakes near Seward
- Magnitude
- M 2.1 (ml)
- Depth
- 17 km below the surface
- Felt
- no reports yet
- Nearest
- Anchorage Municipality, 101 km NNW
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 397 days ago
Earthquake alerts for Seward, AK
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Alerts are on for .
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This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Seward, 50 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
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.
For this area
The largest earthquake within 50 km since 2016 was M 4.4 on 2022-07-12 — about 2,800 times the energy of this one.
Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:
- 6.6 3 km SW of Bear Creek, Alaska · 47 km WSW of this epicentre
- 6.1 25 km WSW of Chenega, Alaska · 38 km SSE of this epicentre
- 5.8 29 km NW of Chenega, Alaska · 16 km ESE of this epicentre
- 5.8 33 km ESE of Bear Creek, Alaska · 25 km SSW of this epicentre
- 5.7 43 km WSW of Chenega, Alaska · 50 km S of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 60.3184, -148.6511. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Anchorage Municipality, AK | 101 km (63 mi) | NNW | earthquakes near Anchorage Municipality |
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.
- 2.1 35 km NNW of Chenega, Alaska
- 1.8 33 km WNW of Chenega, Alaska
- 1.9 18 km W of Chenega, Alaska
- 2.1 20 km E of Moose Pass, Alaska
- 1.9 34 km SSE of Whittier, Alaska
- 1.9 15 km ESE of Lowell Point, Alaska
- 1.7 41 km NNW of Chenega, Alaska
- 1.7 32 km NW of Chenega, Alaska
- 1.7 17 km E of Lowell Point, Alaska
- 1.7 35 km SSE of Whittier, Alaska
- 2.0 12 km ESE of Whittier, Alaska
- 1.9 27 km SSE of Whittier, Alaska
- 1.5 26 km SSE of Whittier, Alaska
- 2.1 22 km WNW of Chenega, Alaska
- 1.9 29 km SE of Whittier, 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.