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SeismoAtlas

M3.2 earthquake 49 km WNW of Anchorage, Alaska, United States

A magnitude 3.2 earthquake struck 49 km WNW of Anchorage, Alaska, United States at 02:50 local time (10:50 UTC) on 23 Sept 2026, at a depth of 61 km, according to USGS. The solution is preliminary and may be revised.

2 reports to USGS “Did You Feel It?”

Data: USGS · updated 2026-09-24 10:55 UTC · automatic solution

Magnitude
3.2minor
local magnitude (Richter) (ml)
Depth
60.9 km
Status
Automatic
Origin time
2026-09-23 10:50:05 UTC
Local: 23 Sept 2026, 02:50:05 (America/Anchorage)
Epicentre
61.384° N, 150.742° W

Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map

Nearby places

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
AnchorageAlaska, United States · pop. 289,60049 kmINot felt
Knik-FairviewAlaska, United States · pop. 14,92362 kmINot felt
Eagle RiverAlaska, United States · pop. 24,79363 kmINot felt

Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more.

Every agency's solution

Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS · AK.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey3.2 ml60.9 km61.38° N, 150.74° W–Automatic

How big was it?

Often felt by people at rest close to the epicentre, rarely causes damage.

It released roughly the energy of 951 kg of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 61 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M3.2 releases about 32× the energy of M2.2, and its waves are about 10× taller on a seismogram. Energy: 951 kg of TNT vs 30 kg of TNT.

Each square is the energy of one M2.2. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

5 later earthquakes within 30 km; the largest was M2.9 1 day ago. 1 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M3.2

5 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
58.021.614
88.802.950
110.292.062
117.211.219
118.662.555
  1. 2.929 km WNW of Anchorage, Alaska, United States09-27 03:38
  2. 2.544 km WNW of Anchorage, Alaska, United States09-28 09:29
  3. 2.067 km W of Meadow Lakes, Alaska, United States09-28 01:07
  4. 1.669 km NW of Anchorage, Alaska, United States09-25 20:51
  5. 1.276 km WNW of Anchorage, Alaska, United States09-28 08:02

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

How strong was the shaking where you were?

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Reports on SeismoAtlas

No reports yet.

USGS “Did You Feel It?” has 2 reports: add yours at USGS.

Event id aka2026swhmgk. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS · AK (usgs:aka2026swhmgk). Cite as: SeismoAtlas, “M3.2 earthquake 49 km WNW of Anchorage, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026swhmgk-m3-2-earthquake-49-km-wnw-of-anchorage-alaska-united-states, data from USGS.

JSON: /api/v1/events/aka2026swhmgk. SeismoAtlas is not an official warning service.