Earthquake · automatic estimate, may change
M 2.1ml
Earthquake near Nikiski, AK
No earthquake was likely felt in Nikiski in the 24 hours to 11:17 pm AKST (08:17 UTC). The last one was M 4.3, 58 km (36 mi) SSE, at 2:30 am AKST on 1 November 2026, estimated intensity II (weak) in town; 115 felt reports to USGS. Every earthquake near Nikiski
This page: a magnitude 2.1 earthquake was recorded 38 km (24 mi) north-northeast of Nikiski, AK, at 9:43 am AKST on 10 November 2026 (18:43 UTC), 1.0 km deep. 1 person has reported feeling it to USGS. The magnitude and location are an automatic first estimate and may change.
USGS: 9 km SE of Tyonek, Alaska
64 km (40 mi) WSW of Anchorage, AK
- When
- 9:43 am AKST on 10 November 2026 ()
- Where
- 38 km (24 mi) north-northeast of Nikiski, AK · earthquakes near Nikiski
- Magnitude
- M 2.1 (ml)
- Depth
- 1.0 km below the surface
- Felt
- 1 report · strongest reported intensity I
- Nearest
- Anchorage Municipality, 95 km ENE
- Nearest mapped fault
- Granite Point anticline (Cook Inlet folds), 14 km from its surface trace — near is not the same as on
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 4 days ago
Earthquake alerts for Nikiski, AK
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 17 km (11 mi) from the epicentre. In Nikiski, 38 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 4.8 on 2022-07-12 — about 11,000 times the energy of this one.
Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:
- 6.8 Southern Alaska · 11 km NNW of this epicentre
- 6.8 4 km NE of Beluga, Alaska · 18 km N of this epicentre
- 6.7 6 km WNW of Nikiski, Alaska · 38 km SSW of this epicentre
- 6.4 19 km SSE of Tyonek, Alaska · 12 km S of this epicentre
- 6.0 Southern Alaska · 43 km NW 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 61.0050, -151.0160. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Anchorage Municipality, AK | 95 km (59 mi) | ENE | earthquakes near Anchorage Municipality |
| Kenai Peninsula Borough, AK | 100 km (62 mi) | SW | earthquakes near Kenai Peninsula Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 1.8 16 km NNW of Point Possession, Alaska
- 3.3 10 km ESE of Nikiski, Alaska
- 1.7 16 km SW of Tyonek, Alaska
- 2.5 21 km NNE of Sterling, Alaska
- 2.4 7 km NNW of Sterling, Alaska
- 2.1 22 km WNW of Tyonek, 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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| reported intensity | not reported | 1 | |
| felt reports | not reported | 1 |
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.