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M1.0 earthquake 79 km NW of Homer, Alaska, United States

A magnitude 1.0 earthquake struck 79 km NW of Homer, Alaska, United States at 04:55 local time (12:55 UTC) on 28 Sept 2026, at a depth of 100 km, according to USGS.

Data: USGS · updated 2026-09-29 23:14 UTC · reviewed

Magnitude
1.0micro
local magnitude (Richter) (ml)
Depth
100 km
Status
Reviewed
Origin time
2026-09-28 12:55:45 UTC
Local: 28 Sept 2026, 04:55:45 (America/Anchorage)
Epicentre
60.034° N, 152.725° 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. 5,51579 kmINot felt
KalifornskyAlaska, United States · pop. 7,85090 kmINot felt
AnchorageAlaska, United States · pop. 289,600203 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 Survey1.0 ml100 km60.03° N, 152.72° 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 477 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 100 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.

The same size.

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

Aftershocks and nearby activity

99 later earthquakes within 30 km; the largest was M3.0 5 days ago. 54 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.0

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
4.89-0.70
6.21-1.01
7.830.64
8.91-0.84
9.49-0.7-2
16.33-0.72
18.401.6102
18.911.4102
26.481.068
30.02-1.03
34.71-0.70
35.530.55
36.22-0.81
38.17-1.1-2
44.09-0.90
47.14-0.83
48.520.55
48.76-0.92
49.410.55
49.71-1.0-2
50.09-0.41
51.13-0.91
52.652.087
55.92-1.2-2
57.570.85
59.532.1106
59.66-0.30
60.10-0.61
60.92-0.60
61.471.397
62.453.094
67.491.899
67.56-0.50
70.57-0.8-1
70.970.626
75.76-1.01
78.49-0.81
78.552.6100
79.17-0.72
79.732.1112
82.370.433
82.431.046
83.331.9145
83.71-0.92
84.29-0.71
86.91-1.11
87.601.7125
89.48-1.20
90.86-0.4-2
91.62-0.82
93.05-1.20
93.71-1.11
93.87-1.02
94.100.35
95.15-0.96
100.19-0.5-3
103.35-0.72
104.76-1.1-2
104.83-0.91
104.98-0.25
105.02-0.50
106.06-1.0-1
106.99-0.80
107.80-0.51
108.45-0.30
110.530.75
111.24-0.83
114.220.55
114.611.5103
114.810.65
115.760.896
132.922.2128
137.37-0.11
141.34-0.6-2
142.301.3160
147.49-0.9-2
148.93-0.81
161.04-0.91
163.611.2118
163.67-0.1-1
163.910.45
166.183.0105
167.242.6125
167.860.75
168.360.55
171.330.35
172.210.21
172.500.30
179.76-1.33
179.810.45
183.28-0.85
188.48-0.80
188.770.6100
189.17-0.62
190.61-0.91
191.89-0.91
192.18-1.20
192.43-0.92
198.261.097
  1. 3.060 km NW of Homer, Alaska, United States10-01 03:22
  2. 3.069 km WSW of Kalifornsky, Alaska, United States10-05 11:06
  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. 2.2101 km WSW of Kalifornsky, Alaska, United States10-04 01:51
  6. 2.178 km WSW of Kalifornsky, Alaska, United States10-01 00:27
  7. 2.181 km NW of Homer, Alaska, United States10-01 20:39
  8. 2.064 km WNW of Homer, Alaska, United States09-30 17:34
  9. 1.9100 km WNW of Homer, Alaska, United States10-02 00:15
  10. 1.873 km WNW of Homer, Alaska, United States10-01 08:25
  11. 1.783 km WSW of Kalifornsky, Alaska, United States10-02 04:31
  12. 1.678 km NW of Homer, Alaska, United States09-29 07:19
  13. 1.585 km WNW of Homer, Alaska, United States10-03 07:32
  14. 1.477 km WSW of Kalifornsky, Alaska, United States09-29 07:50
  15. 1.372 km WSW of Kalifornsky, Alaska, United States10-01 02:23
  16. 1.368 km WSW of Kalifornsky, Alaska, United States10-04 11:13
  17. 1.292 km WNW of Homer, Alaska, United States10-05 08:32
  18. 1.0102 km WSW of Kalifornsky, Alaska, United States09-29 15:24
  19. 1.093 km WNW of Homer, Alaska, United States10-01 23:21
  20. 1.077 km WNW of Homer, Alaska, United States10-06 19:11
  21. 0.8100 km WNW of Homer, Alaska, United States09-30 22:30
  22. 0.880 km WNW of Homer, Alaska, United States10-03 08:41
  23. 0.796 km WNW of Homer, Alaska, United States10-03 03:27
  24. 0.792 km WNW of Homer, Alaska, United States10-05 12:47
  25. 0.696 km WNW of Homer, Alaska, United States09-28 20:45

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Reports on SeismoAtlas

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Event id aka2026tfruca. First recorded here 29 Sept 2026, 23:32:16 UTC. Solutions: USGS · AK (usgs:aka2026tfruca). Cite as: SeismoAtlas, “M1.0 earthquake 79 km NW of Homer, Alaska, United States”, https://seismoatlas.com/earthquake/aka2026tfruca-m1-0-earthquake-79-km-nw-of-homer-alaska-united-states, data from USGS.

JSON: /api/v1/events/aka2026tfruca. SeismoAtlas is not an official warning service.