M-0.3 earthquake 96 km WNW of Homer, Alaska, United States

Name: M-0.3 earthquake 96 km WNW of Homer, Alaska, United States
Start: 2026-09-23T01:46:23.010Z
End: 2026-09-23T01:46:23.010Z
Location: 96 km WNW of Homer, Alaska, United States

A magnitude -0.3 earthquake struck 96 km WNW of Homer, Alaska, United States at 17:46 local time (01:46 UTC) on 22 Sept 2026, at a depth of 0 km, according to USGS.

Data: USGS · updated 2026-09-23 21:32 UTC · reviewed

Magnitude: -0.3micro
local magnitude (Richter) (ml)
Depth: -0.2 km
Status: Reviewed
Origin time: 2026-09-23 01:46:23 UTC; Local: 22 Sept 2026, 17:46:23 (America/Anchorage)
Epicentre: 60.028° N, 153.082° 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
Place	Distance	Est. shaking
HomerAlaska, United States · pop. 5,515	96 km	INot felt
KalifornskyAlaska, United States · pop. 7,850	108 km	INot felt
AnchorageAlaska, United States · pop. 289,600	218 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. Likely felt out to about 0 km.

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 · AV, which has been reviewed by an analyst.

Agency	Magnitude	Depth	Epicentre	Time offset	Status
USGS · AVheadlineAlaska Volcano Observatory via U.S. Geological Survey	-0.3 ml	-0.2 km	60.03° N, 153.08° W	–	Reviewed

How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 5 g 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 0 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

Compare M-0.3 with M1.0

M1.0 releases about 102× the energy of M-0.3, and its waves are about 22× taller on a seismogram. Energy: 477 g of TNT vs 5 g of TNT.

Each square is the energy of one M-0.3. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

33 later earthquakes within 30 km; the largest was M3.1 1 day ago. 17 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M-0.3

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

Aftershocks
Time after mainshock (hours)	Magnitude	Depth (km)
8.43	2.8	94
14.39	1.4	87
15.87	2.8	101
16.83	-0.6	-1
17.47	2.1	135
19.78	1.6	142
24.23	1.5	126
26.39	-0.4	-3
27.88	-0.5	2
29.70	-0.3	5
30.10	-0.8	-2
32.84	-0.6	-1
33.17	0.6	5
35.88	-1.1	0
36.53	-0.6	1
38.28	0.4	5
39.56	0.0	6
40.61	0.3	15
43.75	-0.4	3
45.12	-0.5	2
48.15	-0.3	6
48.69	-0.9	1
73.73	2.3	134
76.73	0.1	-2
85.93	2.4	124
110.02	1.7	119
111.20	2.6	128
118.62	-0.7	0
119.29	3.1	138
123.69	-0.4	3
127.36	0.2	12
128.08	-0.4	6
138.99	0.6	4

Did you feel it?

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

Reports on SeismoAtlas

No reports yet.

Event id av94444361. First recorded here 28 Sept 2026, 17:32:11 UTC. Solutions: USGS · AV (usgs:av94444361). Cite as: SeismoAtlas, “M-0.3 earthquake 96 km WNW of Homer, Alaska, United States”, https://seismoatlas.com/earthquake/av94444361-m-0-3-earthquake-96-km-wnw-of-homer-alaska-united-states, data from USGS.

JSON: /api/v1/events/av94444361. SeismoAtlas is not an official warning service.