Earthquake · reviewed by a seismologist
M 1.9ml
46 km SSE of Nelchina, Alaska
Yes. A magnitude 1.9 earthquake was recorded 46 km SSE of Nelchina, Alaska, at 4:36 am AKST on 27 November 2025 (13:36 UTC), 12 km deep.
- When
- Magnitude
- M 1.9 (ml)
- Depth
- 12 km below the surface
- Felt
- no reports yet
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 289 days ago
Earthquake alerts for Valdez, AK
Get a notification in this browser when USGS records an earthquake near Valdez, AK. No account or email needed.
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 8 km (5 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
- Magna, Utah 2020 M 5.7 500,000× the energy of this one
- Around the size people start to feel M 3.0 45× the energy of this one
- This earthquake M 1.9 about 21 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 4.3 on 2018-10-16 — about 4,000 times the energy of this one.
Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:
- 5.5 48 km WNW of Valdez, Alaska · 47 km SW of this epicentre
- 5.1 48 km NNW of Valdez, Alaska · 15 km WSW of this epicentre
- 5.1 9 km ESE of Eureka Roadhouse, Alaska · 45 km NW of this epicentre
- 5.1 48 km SSE of Nelchina, Alaska · 2 km SSW 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 61.6080, -146.4000. Map © OpenStreetMap contributors.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 1.6 34 km NW of Valdez, Alaska
- 2.2 38 km N of Valdez, Alaska
- 1.6 38 km NNW of Valdez, Alaska
- 1.9 48 km N of Valdez, Alaska
- 2.1 51 km SSE of Nelchina, Alaska
- 1.7 48 km N of Valdez, Alaska
- 1.6 11 km WNW of Valdez, Alaska
- 1.8 24 km NW of Valdez, Alaska
- 2.1 47 km SSE of Nelchina, Alaska
- 1.7 44 km WSW of Tonsina, Alaska
- 1.9 52 km N of Valdez, Alaska
- 1.7 32 km NW of Valdez, Alaska
- 2.5 46 km SSE of Nelchina, Alaska
- 2.3 49 km SSE of Eureka Roadhouse, Alaska
- 2.3 52 km SE of Nelchina, 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.