Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Eielson Air Force Base, AK
No earthquake was likely felt in Eielson Air Force Base in the 24 hours to 3:10 am AKST (12:10 UTC). The last one was M 1.7, 6 km (4 mi) SE, at 4:08 pm AKST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Eielson Air Force Base
This page: a magnitude 1.7 earthquake was recorded 39 km (24 mi) east-northeast of Eielson Air Force Base, AK, at 8:09 am AKDT on 13 May 2026 (16:09 UTC), 21 km deep.
USGS: 31 km ESE of Pleasant Valley, Alaska
- When
- 8:09 am AKDT on 13 May 2026 ()
- Where
- 39 km (24 mi) east-northeast of Eielson Air Force Base, AK · earthquakes near Eielson Air Force Base
- Magnitude
- M 1.7 (ml)
- Depth
- 21 km below the surface
- Felt
- no reports yet
- Nearest
- Fairbanks North Star Borough, 15 km SW
- Nearest mapped fault
- Atsaksovluk fault, 11 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 183 days ago
Earthquake alerts for Eielson Air Force Base, AK
Get a notification in this browser when USGS records an earthquake near Eielson Air Force Base, 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 it was probably too small to be felt, even directly above it. In Eielson Air Force Base, 39 km away, the estimate is intensity I (not felt). 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 89× the energy of this one
- This earthquake M 1.7 about 11 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 4.9 on 2021-09-14 — about 63,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 7.1 Central Alaska · 30 km WSW 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 64.7590, -146.2610. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Fairbanks North Star Borough, AK | 15 km (9 mi) | SW | earthquakes near Fairbanks North Star Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
12 earthquakes have been recorded within 50 km since this one.
- 1.4 11 km NNE of Pleasant Valley, Alaska
- 1.5 27 km ENE of Salcha, Alaska
- 1.1 16 km SSE of Pleasant Valley, Alaska
- 1.7 23 km ENE of Harding-Birch Lakes, Alaska
- 0.8 15 km ENE of Salcha, Alaska
- 1.5 8 km NW of Harding-Birch Lakes, Alaska
- 1.8 37 km NE of Harding-Birch Lakes, Alaska
- 1.3 17 km NE of Pleasant Valley, Alaska
- 2.4 54 km E of Pleasant Valley, Alaska
- 1.9 19 km E of Pleasant Valley, Alaska
- 1.9 6 km E of Salcha, Alaska
- 2.8 44 km NE of Pleasant Valley, 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.