Earthquake · reviewed by a seismologist
M 1.5ml
72 km E of Cantwell, Alaska
Yes. A magnitude 1.5 earthquake was recorded 72 km E of Cantwell, Alaska, at 3:21 pm AKDT on 7 April 2026 (23:21 UTC), 5.0 km deep.
- When
- Magnitude
- M 1.5 (ml)
- Depth
- 5.0 km below the surface
- Felt
- no reports yet
- Nearest mapped fault
- Denali fault, 3 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 220 days ago
Earthquake alerts for Healy, 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
- Around the size people start to feel M 3.0 180× the energy of this one
- This earthquake M 1.5 about 5.4 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 4.0 on 2025-08-14 — about 5,600 times the energy of this one.
Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:
- 7.9 2002 Denali Fault, Alaska Earthquake · 4 km NE of this epicentre
- 6.6 53 km ENE of Cantwell, Alaska · 20 km W of this epicentre
- 5.1 77 km E of Cantwell, Alaska · 5 km NE of this epicentre
- 5.1 78 km ESE of McKinley Park, Alaska · 7 km ENE of this epicentre
- 5.1 36 km ENE of Cantwell, Alaska · 36 km W 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 63.4920, -147.5180. Map © OpenStreetMap contributors.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 1.6 74 km E of Cantwell, Alaska
- 1.8 70 km E of Denali Park, Alaska
- 2.6 65 km ESE of Cantwell, Alaska
- 2.0 68 km E of Denali Park, Alaska
- 2.2 65 km ESE of Cantwell, Alaska
- 1.6 68 km ESE of Cantwell, Alaska
- 1.6 46 km ESE of Denali Park, Alaska
- 1.6 47 km ESE of Denali Park, Alaska
- 1.6 56 km ENE of Cantwell, Alaska
- 1.6 65 km E of Denali Park, Alaska
- 1.5 70 km ESE of Denali Park, Alaska
- 1.6 79 km ESE of Denali Park, Alaska
- 1.7 81 km ESE of Denali Park, Alaska
- 1.8 81 km E of Denali Park, Alaska
- 1.6 62 km E of Cantwell, 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.