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SeismoAtlas

M1.5 earthquake 8 km ESE of Cloverdale, California, United States

A magnitude 1.5 earthquake struck 8 km ESE of Cloverdale, California, United States at 14:27 local time (21:27 UTC) on 3 Oct 2026, at a depth of 6 km, according to USGS. The solution is preliminary and may be revised.

Data: USGS · updated 2026-10-03 21:29 UTC · automatic solution

Magnitude
1.5micro
duration magnitude (md)
Depth
6.4 km
Status
Automatic
Origin time
2026-10-03 21:27:38 UTC
Local: 3 Oct 2026, 14:27:38 (America/Los Angeles)
Epicentre
38.779° N, 122.935° 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
CloverdaleCalifornia, United States · pop. 8,8118 kmINot felt
HealdsburgCalifornia, United States · pop. 11,74220 kmINot felt
WindsorCalifornia, United States · pop. 27,46427 kmINot felt
Santa RosaCalifornia, United States · pop. 178,12742 kmINot felt
Rohnert ParkCalifornia, United States · pop. 42,40753 kmINot felt
Agua CalienteCalifornia, United States · pop. 27,09064 kmINot felt
San FranciscoCalifornia, United States · pop. 827,526121 kmINot felt
OaklandCalifornia, United States · pop. 419,267123 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 · NC.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · NCheadlineNorthern California Seismic System via U.S. Geological Survey1.5 md6.4 km38.78° N, 122.94° W–Automatic

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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 2 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 6 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.5 releases about 5.1× the energy of M1.0, and its waves are about 3× taller on a seismogram. Energy: 2 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

252 later earthquakes within 30 km; the largest was M2.3 3 days ago. 251 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.791.22
1.850.72
3.711.12
3.780.24
4.070.72
5.311.12
5.371.03
6.791.12
7.770.83
8.311.10
8.340.72
9.460.72
9.731.61
12.030.82
12.191.12
13.990.82
14.810.73
15.500.22
15.640.82
16.451.02
20.491.53
20.640.83
21.530.87
21.691.12
22.430.9-1
22.470.32
23.320.84
23.970.73
24.440.82
25.031.02
25.151.03
26.891.02
27.280.72
27.420.72
29.000.42
29.720.82
30.570.72
31.270.82
31.910.710
33.640.83
34.201.32
34.281.02
35.811.02
36.791.62
36.880.72
37.861.03
38.291.64
41.400.31
41.530.73
42.020.22
43.341.42
43.510.71
43.811.03
44.620.72
44.631.12
53.250.72
53.441.10
54.071.12
54.980.81
55.490.92
55.910.72
57.570.83
58.090.83
58.241.20
58.631.01
59.760.81
59.901.11
60.131.01
61.931.33
62.790.82
63.880.32
66.041.12
67.960.33
68.311.52
68.921.43
69.041.03
69.170.92
70.241.14
72.291.21
73.930.72
74.931.31
75.020.73
75.230.73
76.010.72
76.941.32
77.941.12
78.170.53
79.361.42
79.360.73
79.750.22
79.911.02
80.362.09
80.450.74
81.310.71
81.320.62
81.520.42
81.630.83
81.811.12
82.201.32
83.261.91
83.300.80
84.710.60
85.431.11
86.751.12
88.481.04
88.520.73
89.991.12
90.061.12
91.140.72
92.880.92
92.910.72
93.411.12
95.411.11
96.031.13
96.230.52
97.760.81
97.841.33
99.450.82
100.181.11
101.491.33
103.021.7-1
103.101.23
104.930.52
106.351.13
106.561.03
109.021.31
112.871.33
112.990.83
113.501.26
113.611.43
116.450.72
116.510.94
117.640.73
117.981.13
120.200.80
121.270.83
121.500.90
122.610.92
122.612.33
122.841.82
122.860.83
123.561.12
123.580.83
124.381.02
124.820.73
124.952.03
125.851.33
125.891.12
127.481.53
129.200.21
129.341.11
129.690.31
130.481.01
130.600.92
130.690.72
130.821.12
131.820.42
132.080.82
135.191.11
135.221.30
135.451.01
137.211.32
139.340.42
139.690.92
141.411.33
142.630.82
143.160.93
143.920.72
143.960.73
144.171.02
144.511.12
145.331.13
145.361.12
145.380.82
145.940.72
147.700.80
148.220.42
149.840.82
151.951.02
152.760.53
152.841.13
152.901.12
154.030.52
155.510.53
156.490.82
156.560.73
157.121.12
158.280.83
160.011.12
160.031.12
160.050.82
161.201.73
161.210.73
162.560.92
162.930.43
166.070.312
167.261.81
167.661.82
168.730.72
169.490.83
169.880.82
173.661.61
174.931.82
175.430.72
175.440.87
175.871.02
176.021.13
178.890.72
180.751.12
181.220.72
182.170.72
182.721.02
182.751.10
183.621.11
183.711.01
184.360.92
184.651.72
184.670.92
184.781.52
184.800.22
186.780.82
187.081.42
190.041.01
190.050.43
192.100.72
192.220.82
192.470.83
192.601.12
193.101.11
193.210.92
193.861.22
194.630.22
194.890.73
195.390.82
196.261.12
196.480.83
197.390.63
197.751.02
198.101.02
200.451.11
200.461.22
201.170.72
202.100.82
203.290.82
204.030.72
206.520.82
208.151.93
208.170.93
208.260.83
208.761.12
209.882.02
209.881.12
  1. 2.318 km E of Cloverdale, California, United States10-09 00:04
  2. 2.016 km E of Cloverdale, California, United States10-07 05:49
  3. 2.019 km E of Cloverdale, California, United States10-09 02:24
  4. 2.017 km W of Hidden Valley Lake, California, United States10-12 15:20
  5. 1.920 km E of Cloverdale, California, United States10-12 13:36
  6. 1.916 km WSW of Hidden Valley Lake, California, United States10-07 08:43
  7. 1.818 km E of Cloverdale, California, United States10-09 00:17
  8. 1.816 km WSW of Hidden Valley Lake, California, United States10-10 21:07
  9. 1.817 km W of Hidden Valley Lake, California, United States10-10 20:43
  10. 1.818 km W of Hidden Valley Lake, California, United States10-11 04:23
  11. 1.719 km E of Cloverdale, California, United States10-10 14:39
  12. 1.718 km E of Cloverdale, California, United States10-11 14:06
  13. 1.718 km E of Cloverdale, California, United States10-08 04:28
  14. 1.619 km SW of Clearlake, California, United States10-05 10:15
  15. 1.618 km W of Hidden Valley Lake, California, United States10-11 03:07
  16. 1.618 km W of Hidden Valley Lake, California, United States10-05 11:45
  17. 1.618 km ENE of Cloverdale, California, United States10-04 07:11
  18. 1.519 km W of Hidden Valley Lake, California, United States10-04 17:57
  19. 1.518 km E of Cloverdale, California, United States10-11 14:14
  20. 1.520 km SW of Clearlake, California, United States10-06 17:46
  21. 1.518 km E of Cloverdale, California, United States10-09 04:56
  22. 1.420 km W of Hidden Valley Lake, California, United States10-05 16:48
  23. 1.418 km E of Cloverdale, California, United States10-11 16:32
  24. 1.420 km E of Cloverdale, California, United States10-08 15:03
  25. 1.418 km E of Cloverdale, California, United States10-06 18:22

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Event id nc75443706. First recorded here 3 Oct 2026, 21:29:34 UTC. Solutions: USGS · NC (usgs:nc75443706). Cite as: SeismoAtlas, “M1.5 earthquake 8 km ESE of Cloverdale, California, United States”, https://seismoatlas.com/earthquake/nc75443706-m1-5-earthquake-8-km-ese-of-cloverdale-california-united-states, data from USGS.

JSON: /api/v1/events/nc75443706. SeismoAtlas is not an official warning service.