Earthquake · reviewed by a seismologist
M 1.8ml
43 km ESE of Knik River, Alaska
Yes. A magnitude 1.8 earthquake was recorded 43 km ESE of Knik River, Alaska, 94 km (58 mi) E of Anchorage, AK, at 11:47 pm AKST on 4 November 2026 (08:47 UTC), 9.7 km deep.
94 km (58 mi) E of Anchorage, AK
- When
- Magnitude
- M 1.8 (ml)
- Depth
- 9.7 km below the surface
- Felt
- no reports yet
- Nearest
- Anchorage Municipality, 62 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 9 days ago
Earthquake alerts for Butte, 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 9 km (6 mi) from the epicentre. 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 710,000× the energy of this one
- Around the size people start to feel M 3.0 63× the energy of this one
- This earthquake M 1.8 about 15 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 4.6 on 2018-01-27 — about 16,000 times the energy of this one.
Before 2016, the USGS record lists 19 earthquakes of M5 or more within 50 km; the five largest:
- 6.8 31 km SSW of Glacier View, Alaska · 31 km NE of this epicentre
- 6.6 57 km ENE of Whittier, Alaska · 38 km SSE of this epicentre
- 6.4 23 km S of Glacier View, Alaska · 41 km NE of this epicentre
- 6.4 37 km SSE of Glacier View, Alaska · 45 km ENE of this epicentre
- 6.3 27 km ENE of Whittier, Alaska · 47 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 61.3120, -148.1520. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Anchorage Municipality, AK | 62 km (39 mi) | WSW | earthquakes near Anchorage Municipality |
| Matanuska-Susitna Borough, AK | 128 km (79 mi) | NNW | earthquakes near Matanuska-Susitna Borough |
| Chugach Census Area, AK | 140 km (87 mi) | SE | earthquakes near Chugach Census Area |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
18 earthquakes have been recorded within 50 km since this one.
- 1.4 19 km S of Glacier View, Alaska
- 0.9 64 km S of Glacier View, Alaska
- 1.0 66 km WNW of Tatitlek, Alaska
- 1.4 30 km NNE of Whittier, Alaska
- 1.6 63 km S of Glacier View, Alaska
- 1.6 24 km ESE of Chickaloon, Alaska
- 1.1 23 km SE of Chickaloon, Alaska
- 0.7 33 km NNE of Whittier, Alaska
- 1.2 61 km S of Glacier View, Alaska
- 1.3 64 km NW of Tatitlek, Alaska
- 1.4 51 km NE of Whittier, Alaska
- 1.7 32 km SE of Chickaloon, Alaska
- 1.4 66 km WNW of Tatitlek, Alaska
- 1.3 66 km S of Glacier View, Alaska
- 2.0 19 km WSW of Glacier View, 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 |
|---|---|---|---|
| review status | automatic | reviewed | |
| location | 42 km ESE of Knik River, Alaska | 43 km ESE of Knik River, Alaska | |
| longitude | -148.18 | -148.15 | |
| latitude | 61.31 | 61.31 | |
| depth | 5.6 | 9.7 | |
| location | 41 km ESE of Knik River, Alaska | 42 km ESE of Knik River, Alaska | |
| longitude | -148.19 | -148.18 | |
| latitude | 61.31 | 61.31 | |
| depth | 14.1 | 5.6 | |
| magnitude | 1.4 | 1.8 |
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.