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M1.8 earthquake 14 km NNE of Calistoga, California, United States

A magnitude 1.8 earthquake struck 14 km NNE of Calistoga, California, United States at 06:03 local time (13:03 UTC) on 7 Oct 2026, at a depth of 6 km, according to USGS. The solution is preliminary and may be revised.

Data: USGS · updated 2026-10-07 13:05 UTC · automatic solution

Magnitude
1.8micro
duration magnitude (md)
Depth
6.4 km
Status
Automatic
Origin time
2026-10-07 13:03:51 UTC
Local: 7 Oct 2026, 06:03:51 (America/Los Angeles)
Epicentre
38.687° N, 122.495° 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
CalistogaCalifornia, United States · pop. 5,33014 kmINot felt
Hidden Valley LakeCalifornia, United States · pop. 5,57915 kmINot felt
WindsorCalifornia, United States · pop. 27,46432 kmINot felt
Santa RosaCalifornia, United States · pop. 178,12733 kmINot felt
Agua CalienteCalifornia, United States · pop. 27,09041 kmINot felt
Rohnert ParkCalifornia, United States · pop. 42,40743 kmINot felt
SacramentoCalifornia, United States · pop. 524,94388 kmINot felt
OaklandCalifornia, United States · pop. 419,267101 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 Survey1.8 md6.4 km38.69° N, 122.50° 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 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 6 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.8 releases about 17× the energy of M1.0, and its waves are about 6.6× 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

41 later earthquakes within 30 km; the largest was M2.1 1 day ago. 61 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.881.04
0.910.73
3.540.72
8.620.52
10.160.81
12.581.11
18.741.13
21.421.31
25.271.33
26.001.43
28.910.94
30.381.13
32.600.80
33.900.90
35.961.12
42.990.92
43.211.12
44.480.82
47.591.11
47.611.30
47.851.01
53.811.33
57.721.13
67.910.53
70.680.83
79.661.81
79.962.10
80.061.82
81.890.83
86.061.61
87.321.82
89.901.60
105.501.11
106.261.22
107.790.82
108.870.83
110.151.02
118.920.82
120.541.93
120.560.93
121.161.12
  1. 2.17 km N of Saint Helena, California, United States10-10 21:01
  2. 1.920 km E of Cloverdale, California, United States10-12 13:36
  3. 1.816 km WSW of Hidden Valley Lake, California, United States10-10 21:07
  4. 1.817 km W of Hidden Valley Lake, California, United States10-10 20:43
  5. 1.818 km W of Hidden Valley Lake, California, United States10-11 04:23
  6. 1.618 km W of Hidden Valley Lake, California, United States10-11 03:07
  7. 1.68 km NNE of Saint Helena, California, United States10-11 06:57
  8. 1.420 km E of Cloverdale, California, United States10-08 15:03
  9. 1.317 km WSW of Hidden Valley Lake, California, United States10-08 10:28
  10. 1.317 km W of Hidden Valley Lake, California, United States10-09 12:40
  11. 1.320 km E of Cloverdale, California, United States10-08 14:20
  12. 1.320 km E of Cloverdale, California, United States10-09 18:52
  13. 1.218 km W of Hidden Valley Lake, California, United States10-11 23:19
  14. 1.118 km W of Hidden Valley Lake, California, United States10-08 01:38
  15. 1.119 km E of Cloverdale, California, United States10-08 19:26
  16. 1.115 km WSW of Hidden Valley Lake, California, United States10-09 08:16
  17. 1.117 km W of Hidden Valley Lake, California, United States10-09 22:47
  18. 1.119 km SW of Clearlake, California, United States10-12 14:13
  19. 1.120 km E of Cloverdale, California, United States10-08 07:48
  20. 1.118 km W of Hidden Valley Lake, California, United States10-11 22:33
  21. 1.117 km W of Hidden Valley Lake, California, United States10-09 12:39
  22. 1.116 km WSW of Hidden Valley Lake, California, United States10-09 01:01
  23. 1.020 km E of Cloverdale, California, United States10-07 13:56
  24. 1.016 km WSW of Hidden Valley Lake, California, United States10-09 12:54
  25. 1.019 km W of Hidden Valley Lake, California, United States10-12 03:12

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Event id nc75445941. First recorded here 7 Oct 2026, 13:05:58 UTC. Solutions: USGS · NC (usgs:nc75445941). Cite as: SeismoAtlas, “M1.8 earthquake 14 km NNE of Calistoga, California, United States”, https://seismoatlas.com/earthquake/nc75445941-m1-8-earthquake-14-km-nne-of-calistoga-california-united-states, data from USGS.

JSON: /api/v1/events/nc75445941. SeismoAtlas is not an official warning service.