M3.0 earthquake 93 km ENE of Palmer, Alaska, United States
A magnitude 3.0 earthquake struck 93 km ENE of Palmer, Alaska, United States at 02:31 local time (10:31 UTC) on 30 Sept 2026, at a depth of 20 km, according to USGS.
1 reports to USGS “Did You Feel It?”
Data: USGS · updated 2026-10-12 17:45 UTC · reviewed
- Magnitude
- 3.0minor
local magnitude (Richter) (ml) - Depth
- 20.2 km
- Status
- Reviewed
- Origin time
- 2026-09-30 10:31:47 UTC
- Local: 30 Sept 2026, 02:31:47 (America/Anchorage)
- Epicentre
- 62.047° N, 147.616° W
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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
| Place | Distance | Est. shaking |
|---|---|---|
| PalmerAlaska, United States · pop. 6,788 | 93 km | INot felt |
| GatewayAlaska, United States · pop. 5,552 | 100 km | INot felt |
| Eagle RiverAlaska, United States · pop. 24,793 | 131 km | INot felt |
| AnchorageAlaska, United States · pop. 289,600 | 152 km | INot 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, which has been reviewed by an analyst.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey | 3.0 mlwas 3.1 | 20.2 km | 62.05° N, 147.62° W | – | Reviewed · 3 revisions |
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How big was it?
Often felt by people at rest close to the epicentre, rarely causes damage.
It released roughly the energy of 477 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 20 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
M3.0 releases about 32× the energy of M2.0, and its waves are about 10× taller on a seismogram. Energy: 477 kg of TNT vs 15 kg of TNT.
Each square is the energy of one M2.0. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
4 later earthquakes within 30 km; the largest was M2.8 19 h ago. 3 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M3.0
4 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 172.53 | 1.8 | 27 |
| 216.51 | 1.3 | 41 |
| 256.61 | 1.6 | 38 |
| 280.37 | 2.8 | 7 |
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
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Event id aka2026tjfajm. First recorded here 30 Sept 2026, 10:34:35 UTC. Solutions: USGS · AK (usgs:aka2026tjfajm). Cite as: SeismoAtlas, “M3.0 earthquake 93 km ENE of Palmer, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026tjfajm-m3-0-earthquake-93-km-ene-of-palmer-alaska-united-states, data from USGS.
JSON: /api/v1/events/aka2026tjfajm. SeismoAtlas is not an official warning service.