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M1.8 earthquake 90 km NW of Homer, Alaska, United States

A magnitude 1.8 earthquake struck 90 km NW of Homer, Alaska, United States at 21:49 local time (05:49 UTC) on 25 Sept 2026, at a depth of 108 km, according to USGS.

Data: USGS · updated 2026-10-02 22:24 UTC · reviewed

Magnitude
1.8micro
local magnitude (Richter) (ml)
Depth
107.8 km
Status
Reviewed
Origin time
2026-09-26 05:49:00 UTC
Local: 25 Sept 2026, 21:49:00 (America/Anchorage)
Epicentre
60.098° N, 152.890° 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

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
HomerAlaska, United States · pop. 5,51590 kmINot felt
KalifornskyAlaska, United States · pop. 7,85095 kmINot felt
AnchorageAlaska, United States · pop. 289,600205 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, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · AKheadlineAlaska Earthquake Center via U.S. Geological Survey1.8 ml107.8 km60.10° N, 152.89° W–Reviewed

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How big was it?

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

It released roughly the energy of 8 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 108 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.

M1.8 releases about 16× the energy of M1.0, and its waves are about 6.3× taller on a seismogram. Energy: 8 kg of TNT vs 477 g of TNT.

Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

125 later earthquakes within 30 km; the largest was M3.0 2 days ago. 43 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.680.1-2
2.442.0102
3.912.3117
5.222.0134
9.892.4124
33.981.7119
35.152.7128
36.88-0.35
36.91-0.2-1
40.32-0.74
42.58-0.70
44.852.095
47.64-0.43
51.310.212
52.04-0.46
55.111.0100
60.00-0.70
61.32-1.01
62.950.64
64.03-0.84
64.61-0.7-2
71.44-0.72
73.511.6102
74.021.4102
81.591.068
85.13-1.03
89.82-0.70
90.640.55
91.34-0.81
93.28-1.1-2
99.20-0.90
102.25-0.83
103.630.55
103.87-0.92
104.530.55
104.83-1.0-2
105.20-0.41
106.24-0.91
107.762.087
108.472.0154
111.03-1.2-2
112.690.85
114.642.1106
114.78-0.30
115.21-0.61
115.980.833
116.03-0.60
116.581.397
122.601.899
122.68-0.50
125.68-0.8-1
126.080.626
130.87-1.01
133.60-0.81
133.672.6100
134.29-0.72
134.852.1112
137.480.433
137.551.046
138.441.9145
138.83-0.92
139.40-0.71
142.02-1.11
142.721.7125
144.59-1.20
145.97-0.4-2
146.73-0.82
148.16-1.20
148.82-1.11
148.99-1.02
149.210.35
150.26-0.96
155.30-0.5-3
158.47-0.72
159.87-1.1-2
159.94-0.91
160.09-0.25
160.13-0.50
161.17-1.0-1
162.10-0.80
162.92-0.51
163.56-0.30
165.640.75
166.36-0.83
169.330.55
169.721.5103
169.920.65
170.870.896
188.042.2128
192.48-0.11
196.45-0.6-2
197.411.3160
202.60-0.9-2
204.05-0.81
216.15-0.91
218.721.2118
218.78-0.1-1
219.020.45
221.293.0105
222.352.6125
222.970.75
223.480.55
226.440.35
227.320.21
227.620.30
234.88-1.33
234.920.45
238.40-0.85
241.320.642
243.59-0.80
243.880.6100
244.28-0.62
245.72-0.91
247.00-0.91
247.29-1.20
247.55-0.92
250.24-1.2-1
250.75-1.1-2
253.00-0.85
253.371.097
254.15-0.74
258.11-0.4-2
259.042.0172
263.911.7106
272.490.15
  1. 3.069 km WSW of Kalifornsky, Alaska, United States10-05 11:06
  2. 2.787 km WNW of Homer, Alaska, United States09-27 16:58
  3. 2.668 km NW of Homer, Alaska, United States10-01 19:28
  4. 2.695 km NW of Homer, Alaska, United States10-05 12:10
  5. 2.485 km WNW of Homer, Alaska, United States09-26 15:42
  6. 2.378 km WSW of Kalifornsky, Alaska, United States09-26 09:43
  7. 2.2101 km WSW of Kalifornsky, Alaska, United States10-04 01:51
  8. 2.178 km WSW of Kalifornsky, Alaska, United States10-01 00:27
  9. 2.181 km NW of Homer, Alaska, United States10-01 20:39
  10. 2.069 km WSW of Kalifornsky, Alaska, United States09-26 08:15
  11. 2.0100 km WSW of Kalifornsky, Alaska, United States09-26 11:02
  12. 2.074 km WSW of Kalifornsky, Alaska, United States09-28 02:39
  13. 2.064 km WNW of Homer, Alaska, United States09-30 17:34
  14. 2.0103 km WNW of Homer, Alaska, United States09-30 18:17
  15. 2.0113 km WNW of Homer, Alaska, United States10-07 00:51
  16. 1.9100 km WNW of Homer, Alaska, United States10-02 00:15
  17. 1.873 km WNW of Homer, Alaska, United States10-01 08:25
  18. 1.783 km NW of Homer, Alaska, United States09-27 15:47
  19. 1.783 km WSW of Kalifornsky, Alaska, United States10-02 04:31
  20. 1.788 km WSW of Kalifornsky, Alaska, United States10-07 05:43
  21. 1.678 km NW of Homer, Alaska, United States09-29 07:19
  22. 1.585 km WNW of Homer, Alaska, United States10-03 07:32
  23. 1.477 km WSW of Kalifornsky, Alaska, United States09-29 07:50
  24. 1.372 km WSW of Kalifornsky, Alaska, United States10-01 02:23
  25. 1.368 km WSW of Kalifornsky, Alaska, United States10-04 11:13

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Event id aka2026tblmxv. First recorded here 2 Oct 2026, 22:32:25 UTC. Solutions: USGS · AK (usgs:aka2026tblmxv). Cite as: SeismoAtlas, “M1.8 earthquake 90 km NW of Homer, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026tblmxv-m1-8-earthquake-90-km-nw-of-homer-alaska-united-states, data from USGS.

JSON: /api/v1/events/aka2026tblmxv. SeismoAtlas is not an official warning service.