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SeismoAtlas

M1.4 earthquake 18 km W of Hidden Valley Lake, California, United States

A magnitude 1.4 earthquake struck 18 km W of Hidden Valley Lake, California, United States at 17:32 local time (01:32 UTC) on 8 Nov 2026, at a depth of 0 km, according to USGS. The solution is preliminary and may be revised.

Data: USGS · updated 2026-11-09 01:33 UTC · automatic solution

Magnitude
1.4micro
duration magnitude (md)
Depth
0.1 km
Status
Automatic
Origin time
2026-11-09 01:32:06 UTC
Local: 8 Nov 2026, 17:32:06 (America/Los Angeles)
Epicentre
38.803° N, 122.765° 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
PlaceDistanceEst. shaking
Hidden Valley LakeCalifornia, United States · pop. 5,57918 kmINot felt
ClearlakeCalifornia, United States · pop. 15,18221 kmINot felt
WindsorCalifornia, United States · pop. 27,46429 kmINot felt
Santa RosaCalifornia, United States · pop. 178,12741 kmINot felt
Rohnert ParkCalifornia, United States · pop. 42,40752 kmINot felt
Agua CalienteCalifornia, United States · pop. 27,09059 kmINot felt
SacramentoCalifornia, United States · pop. 524,943113 kmINot felt
San FranciscoCalifornia, United States · pop. 827,526119 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. Likely felt out to about 3 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 · NC.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · NCheadlineNorthern California Seismic System via U.S. Geological Survey1.4 md0.1 km38.80° N, 122.77° W–Automatic

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

M1.4 releases about 3.7× the energy of M1.0, and its waves are about 2.4× 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

111 later earthquakes within 30 km; the largest was M1.7 19 h ago. 203 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.4

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.141.33
0.390.72
0.611.02
1.401.32
2.450.21
2.620.72
3.130.93
4.310.82
4.771.12
5.101.13
10.200.92
11.120.72
11.930.62
13.341.02
14.981.03
15.610.72
15.630.42
16.821.12
16.890.82
16.890.42
16.901.22
16.930.82
17.820.92
18.920.82
19.240.73
20.261.02
20.731.14
21.231.10
21.590.62
22.391.04
24.661.01
24.810.42
25.450.72
26.500.61
28.221.12
28.771.44
29.030.72
29.290.81
29.910.83
30.040.72
33.740.33
33.800.52
34.820.95
35.671.62
36.071.31
38.170.72
39.440.81
41.561.22
41.740.73
44.491.12
46.070.82
46.350.72
47.551.12
47.971.12
49.670.82
50.350.72
50.591.12
52.210.92
53.480.72
54.750.52
55.260.72
56.651.02
56.880.82
57.230.52
59.140.92
59.151.12
59.581.41
59.621.21
62.400.73
62.580.90
62.650.73
62.960.51
63.350.72
63.520.72
65.410.83
67.601.31
67.971.62
68.900.82
69.851.03
71.260.74
71.610.94
72.921.01
74.181.74
74.660.62
75.600.53
75.631.12
77.691.22
77.750.72
77.780.82
78.140.81
79.010.73
80.960.72
81.201.02
81.260.71
81.260.72
83.471.12
84.281.72
84.741.62
85.521.02
86.831.31
87.560.33
87.671.02
87.790.83
88.230.93
89.071.12
89.601.50
89.990.67
90.051.12
93.051.21
93.311.52
93.680.91
  1. 1.77 km SE of Cloverdale, California, United States11-12 03:43
  2. 1.718 km E of Cloverdale, California, United States11-12 13:48
  3. 1.618 km W of Hidden Valley Lake, California, United States11-12 14:16
  4. 1.614 km WSW of Hidden Valley Lake, California, United States11-10 13:12
  5. 1.618 km W of Hidden Valley Lake, California, United States11-11 21:30
  6. 1.519 km E of Cloverdale, California, United States11-12 19:08
  7. 1.518 km E of Cloverdale, California, United States11-12 22:50
  8. 1.414 km WSW of Hidden Valley Lake, California, United States11-11 13:06
  9. 1.48 km ESE of Cloverdale, California, United States11-10 06:18
  10. 1.315 km E of Cloverdale, California, United States11-09 02:56
  11. 1.320 km W of Hidden Valley Lake, California, United States11-10 13:36
  12. 1.319 km SW of Clearlake, California, United States11-11 21:08
  13. 1.320 km W of Hidden Valley Lake, California, United States11-09 01:40
  14. 1.316 km W of Hidden Valley Lake, California, United States11-12 16:21
  15. 1.218 km E of Cloverdale, California, United States11-10 19:05
  16. 1.218 km E of Cloverdale, California, United States11-09 18:26
  17. 1.218 km E of Cloverdale, California, United States11-12 07:13
  18. 1.220 km E of Cloverdale, California, United States11-12 22:35
  19. 1.213 km WSW of Hidden Valley Lake, California, United States11-11 13:09
  20. 1.114 km WSW of Hidden Valley Lake, California, United States11-11 04:07
  21. 1.116 km W of Hidden Valley Lake, California, United States11-11 01:05
  22. 1.120 km E of Cloverdale, California, United States11-12 18:36
  23. 1.116 km WSW of Hidden Valley Lake, California, United States11-10 22:01
  24. 1.119 km E of Cloverdale, California, United States11-09 06:38
  25. 1.118 km E of Cloverdale, California, United States11-10 05:45

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Reports on SeismoAtlas

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Event id nc75464237. First recorded here 9 Nov 2026, 01:33:55 UTC. Solutions: USGS · NC (usgs:nc75464237). Cite as: SeismoAtlas, “M1.4 earthquake 18 km W of Hidden Valley Lake, California, United States”, https://seismoatlas.com/earthquake/nc75464237-m1-4-earthquake-18-km-w-of-hidden-valley-lake-california-united-states, data from USGS.

JSON: /api/v1/events/nc75464237. SeismoAtlas is not an official warning service.