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SeismoAtlas

M0.8 earthquake 16 km WSW of Hidden Valley Lake, California, United States

A magnitude 0.8 earthquake struck 16 km WSW of Hidden Valley Lake, California, United States at 12:30 local time (19:30 UTC) on 30 Sept 2026, at a depth of 2 km, according to USGS. The solution is preliminary and may be revised.

Data: USGS · updated 2026-09-30 19:32 UTC · automatic solution

Magnitude
0.8micro
duration magnitude (md)
Depth
1.9 km
Status
Automatic
Origin time
2026-09-30 19:30:28 UTC
Local: 30 Sept 2026, 12:30:28 (America/Los Angeles)
Epicentre
38.758° N, 122.730° 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. 5,57916 kmINot felt
HealdsburgCalifornia, United States · pop. 11,74221 kmINot felt
WindsorCalifornia, United States · pop. 27,46424 kmINot felt
Santa RosaCalifornia, United States · pop. 178,12735 kmINot felt
Rohnert ParkCalifornia, United States · pop. 42,40747 kmINot felt
Agua CalienteCalifornia, United States · pop. 27,09053 kmINot felt
SacramentoCalifornia, United States · pop. 524,943109 kmINot felt
San FranciscoCalifornia, United States · pop. 827,526113 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 Survey0.8 md1.9 km38.76° N, 122.73° W–Automatic

How big was it?

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

It released roughly the energy of 239 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 2 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.0 releases about 2× the energy of M0.8, and its waves are about 1.6× taller on a seismogram. Energy: 477 g of TNT vs 239 g of TNT.

Each square is the energy of one M0.8. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

832 later earthquakes within 30 km; the largest was M2.9 43 days ago. 256 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M0.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
1.302.52
1.311.23
1.612.95
1.692.25
1.761.44
1.811.76
2.641.14
2.821.33
6.440.83
6.461.23
7.731.22
8.991.72
9.281.23
9.301.01
10.210.51
11.550.73
11.661.92
11.661.42
11.690.72
11.700.72
11.991.12
12.421.35
12.690.82
12.710.82
12.770.42
13.001.44
13.261.03
13.400.21
13.570.83
14.350.22
17.311.75
18.891.13
21.050.82
21.411.02
21.581.12
21.650.91
23.511.13
23.871.12
24.011.23
24.290.61
24.420.63
25.250.71
25.281.12
25.690.21
25.920.72
26.581.33
26.761.73
27.011.43
29.851.93
31.681.12
31.681.51
32.371.55
34.640.82
35.080.72
36.190.72
36.571.12
36.630.82
36.901.62
38.090.72
38.590.73
39.171.41
39.310.73
40.450.33
41.600.72
44.291.13
44.390.82
45.190.42
45.321.04
45.831.12
46.801.03
48.040.52
49.601.02
50.390.72
50.591.11
50.601.11
50.610.91
51.950.53
52.890.72
58.651.12
58.730.88
58.760.52
59.000.22
59.930.72
60.280.83
61.050.71
62.502.22
62.502.02
63.071.12
63.090.82
63.091.32
63.291.02
63.481.12
65.040.82
65.662.02
65.831.12
66.340.82
67.190.6-1
67.361.32
67.420.83
68.231.13
68.571.13
69.041.13
69.910.61
70.081.12
72.830.53
73.301.83
73.711.36
73.811.13
73.951.56
74.751.22
75.800.72
77.671.12
77.730.24
78.030.72
79.261.12
79.321.03
80.741.12
81.730.83
82.261.10
82.290.72
83.410.72
83.681.61
85.980.82
86.141.12
87.940.82
88.760.73
89.450.22
89.590.82
90.411.02
94.441.53
94.590.83
95.490.87
95.641.12
96.380.9-1
96.430.32
97.280.84
97.920.73
98.400.82
98.991.02
99.111.03
100.841.02
101.240.72
101.370.72
102.960.42
103.680.82
104.520.72
105.220.82
105.860.710
107.600.83
108.151.32
108.231.02
109.761.02
110.741.62
110.830.72
111.821.03
112.241.64
115.350.31
115.480.73
115.970.22
117.291.42
117.460.71
117.761.03
118.580.72
118.581.12
127.200.72
127.391.10
128.031.12
128.930.81
129.450.92
129.860.72
131.520.83
132.040.83
132.191.20
132.591.01
133.710.81
133.861.11
134.091.01
135.881.33
136.750.82
137.840.32
139.991.12
141.910.33
142.261.52
142.871.43
142.991.03
143.120.92
144.191.14
146.251.21
147.880.72
148.891.31
148.970.73
149.180.73
149.960.72
150.891.32
151.891.12
152.130.53
153.311.42
153.310.73
153.700.22
153.861.02
154.312.09
154.400.74
155.270.71
155.270.62
155.470.42
155.580.83
155.771.12
156.151.32
157.211.91
157.250.80
158.660.60
159.381.11
160.701.12
161.561.86
162.431.04
162.470.73
163.941.12
164.021.12
165.100.72
166.830.92
166.860.72
167.361.12
169.371.11
169.981.13
170.180.52
171.720.81
171.791.33
173.410.82
174.131.11
175.451.33
176.971.7-1
177.061.23
178.890.52
180.301.13
180.511.03
182.971.31
186.831.33
186.940.83
187.451.26
187.561.43
190.400.72
190.460.94
191.590.73
191.931.13
194.150.80
195.230.83
195.460.90
196.560.92
196.572.33
196.791.82
196.820.83
197.511.12
197.540.83
198.331.02
198.780.73
198.902.03
199.801.33
199.851.12
201.431.53
203.150.21
203.291.11
203.640.31
204.431.01
204.550.92
204.640.72
204.771.12
205.780.42
206.040.82
209.141.11
209.171.30
209.401.01
211.161.32
213.300.42
213.640.92
215.361.33
216.580.82
217.110.93
217.880.72
217.910.73
218.131.02
218.461.12
219.281.13
219.311.12
219.330.82
219.890.72
221.650.80
222.170.42
223.790.82
225.901.02
226.720.53
226.791.13
226.851.12
227.980.52
229.460.53
230.450.82
230.510.73
231.081.12
232.240.83
233.961.12
233.981.12
234.010.82
235.151.73
235.160.73
236.520.92
236.890.43
240.020.312
241.211.81
241.611.82
242.680.72
243.450.83
243.840.82
247.611.61
248.881.82
249.380.72
249.390.87
249.821.02
249.971.13
252.840.72
254.701.12
255.180.72
256.120.72
256.671.02
256.701.10
257.571.11
257.661.01
258.310.92
258.601.72
258.620.92
258.731.52
258.750.22
260.730.82
261.041.42
263.991.01
264.000.43
266.050.72
266.170.82
266.420.83
266.551.12
267.051.11
267.160.92
267.821.22
268.580.22
268.850.73
269.340.82
270.221.12
270.430.83
271.340.63
271.711.02
272.051.02
274.411.11
274.411.22
275.120.72
276.050.82
277.250.82
277.980.72
280.470.82
282.101.93
282.120.93
282.210.83
282.711.12
283.832.02
283.841.12
285.740.81
285.870.71
285.900.71
286.601.32
287.030.42
287.050.72
288.281.32
288.290.93
290.680.51
292.531.32
292.630.22
292.850.32
292.941.13
294.841.32
296.540.22
297.510.73
300.241.03
300.391.42
301.700.72
301.930.72
304.171.13
304.260.72
304.470.83
304.610.63
304.630.93
305.641.12
306.261.31
307.520.52
309.751.01
311.580.43
312.570.82
313.270.72
313.521.11
315.290.83
315.301.13
317.250.27
318.391.38
319.131.12
319.531.42
319.641.02
319.670.32
319.900.93
320.511.02
322.280.91
325.200.73
325.820.91
326.311.13
328.871.33
328.971.03
329.971.12
332.250.83
332.421.77
332.501.55
333.590.73
334.401.02
334.860.93
336.111.15
336.831.12
336.930.83
337.391.41
337.901.22
337.990.62
339.760.83
340.421.52
340.450.82
342.271.12
343.002.02
343.041.22
343.081.46
343.550.72
343.920.62
345.051.42
345.141.11
345.141.10
345.371.15
345.921.04
346.350.81
346.602.82
346.621.02
346.630.92
346.641.02
346.671.11
346.730.72
346.851.43
346.990.82
349.732.34
354.750.84
355.231.10
355.430.22
357.680.42
360.411.12
362.880.89
364.051.36
364.391.52
364.401.12
364.411.52
364.411.82
364.450.83
364.811.11
365.231.02
365.440.93
366.650.22
367.550.91
369.610.82
371.800.72
372.411.53
374.820.72
375.570.72
375.681.52
376.641.12
377.260.22
381.061.11
381.850.62
387.240.83
387.681.02
388.310.73
389.621.11
390.131.02
390.201.34
391.190.52
392.511.52
394.090.82
395.321.03
395.330.73
396.381.31
396.771.02
401.180.72
401.811.13
402.740.83
403.671.12
405.340.82
405.851.00
406.871.32
407.590.710
408.301.21
410.070.32
410.751.10
411.130.73
411.931.01
413.030.82
414.840.32
415.091.13
419.321.02
420.770.42
421.250.52
422.551.02
422.681.03
422.991.62
423.062.31
423.081.02
423.091.32
423.210.61
423.370.82
425.901.32
426.161.01
427.651.12
428.250.31
428.600.78
429.781.32
431.310.72
431.621.12
432.010.33
432.901.12
433.030.73
435.300.83
435.431.11
435.851.12
436.041.52
436.640.91
437.421.12
438.181.04
438.391.02
443.590.22
443.741.12
444.591.03
445.120.92
445.160.83
445.791.12
445.821.12
445.820.62
447.681.02
447.721.12
449.780.22
450.530.83
452.661.22
453.001.12
457.120.70
458.970.71
460.240.84
460.981.13
461.550.83
462.741.03
464.021.32
464.180.41
464.270.73
466.271.83
466.711.12
468.570.82
468.580.52
469.000.22
471.640.73
471.721.70
474.180.73
474.680.73
475.262.433
475.311.13
475.321.13
475.840.22
476.882.50
477.361.12
477.531.01
477.880.82
479.011.12
482.010.83
482.520.92
483.150.92
484.360.81
485.411.12
486.991.16
487.280.83
487.760.51
488.320.43
488.971.22
489.811.52
489.961.13
490.831.62
491.271.64
492.102.12
496.821.52
501.870.72
501.950.72
502.301.03
502.620.32
504.481.81
505.231.01
505.241.42
505.611.11
506.070.82
506.370.83
506.810.75
507.310.91
507.841.02
508.931.62
509.940.90
511.171.02
511.251.32
511.400.32
511.881.03
512.770.32
513.161.03
513.860.62
514.361.52
514.651.33
514.861.60
514.970.83
516.261.02
518.770.31
518.781.31
519.881.12
522.490.63
524.181.11
524.691.23
526.041.12
526.150.72
526.661.02
527.690.92
527.711.32
527.720.82
529.071.12
529.690.49
530.151.62
531.721.72
532.450.83
533.741.43
533.751.14
540.250.23
540.511.11
540.510.91
540.720.52
540.831.32
540.841.12
541.481.13
543.950.42
543.951.11
544.100.72
544.571.22
544.670.53
545.491.11
545.790.83
546.780.81
546.811.01
546.840.53
546.921.12
548.791.02
548.920.91
549.760.52
552.021.32
554.000.71
558.271.37
558.331.73
559.820.72
560.100.82
560.280.71
561.541.32
562.170.22
569.371.02
571.720.82
575.251.43
576.142.02
577.152.52
577.152.32
577.340.72
577.380.32
577.870.61
578.440.86
582.651.01
582.742.22
583.221.13
585.881.11
586.311.32
587.401.90
587.411.70
588.011.12
589.141.03
592.481.42
594.592.12
595.091.73
597.020.72
598.010.92
603.541.42
603.561.22
606.501.32
609.581.12
609.770.82
610.261.13
610.531.03
612.540.42
613.070.83
613.221.32
614.140.62
617.020.93
619.201.33
619.641.01
619.661.02
619.790.93
621.771.02
622.100.72
622.231.31
622.681.12
622.730.93
624.211.36
624.210.72
628.020.83
628.930.72
629.030.62
629.750.73
633.690.82
635.180.92
635.260.72
636.120.30
636.661.32
637.961.12
638.010.81
638.881.12
640.310.53
641.011.52
641.210.84
643.410.72
644.290.72
644.690.82
647.860.73
648.381.62
649.970.71
650.110.32
650.180.72
650.190.62
650.320.72
650.470.72
650.800.72
651.230.73
651.260.83
651.880.72
652.870.52
653.050.81
654.550.83
655.801.16
659.971.04
661.640.72
661.750.71
663.080.52
663.081.03
663.910.83
664.971.02
666.571.04
669.081.44
670.021.13
670.440.82
671.231.33
671.351.93
672.110.82
672.600.81
673.481.13
675.600.83
676.060.72
676.681.12
677.110.73
677.490.72
677.670.76
678.731.12
679.610.90
679.631.61
679.640.80
679.650.71
682.170.52
682.430.83
684.691.12
687.070.73
687.771.13
690.761.02
691.480.81
691.720.62
691.781.32
692.321.42
692.940.82
693.351.22
693.771.22
693.771.02
694.140.73
694.680.81
695.380.72
695.870.82
696.761.02
697.411.10
700.901.00
700.971.03
701.011.52
701.341.31
701.541.21
701.601.12
702.140.72
702.381.11
704.130.92
705.161.13
705.200.72
705.501.42
705.530.81
706.360.32
707.450.71
708.011.02
708.490.72
708.510.72
708.691.82
709.230.81
709.430.22
709.651.11
709.680.22
710.440.83
710.521.02
712.341.02
713.301.12
713.690.91
715.600.81
716.241.72
716.250.72
716.331.32
716.370.73
718.402.12
718.581.12
719.070.72
719.621.12
  1. 2.98 km ESE of Cloverdale, California, United States09-30 21:07
  2. 2.817 km E of Cloverdale, California, United States10-15 06:06
  3. 2.513 km WSW of Hidden Valley Lake, California, United States09-30 20:48
  4. 2.519 km E of Cloverdale, California, United States10-24 20:39
  5. 2.519 km W of Hidden Valley Lake, California, United States10-20 16:23
  6. 2.414 km NNE of Cloverdale, California, United States10-20 14:45
  7. 2.318 km E of Cloverdale, California, United States10-09 00:04
  8. 2.319 km E of Cloverdale, California, United States10-24 20:39
  9. 2.312 km ENE of Cloverdale, California, United States10-15 09:14
  10. 2.318 km E of Cloverdale, California, United States10-18 10:34
  11. 2.219 km E of Cloverdale, California, United States10-25 02:15
  12. 2.29 km ESE of Cloverdale, California, United States09-30 21:12
  13. 2.216 km ENE of Cloverdale, California, United States10-03 10:00
  14. 2.119 km E of Cloverdale, California, United States10-25 14:06
  15. 2.115 km WSW of Hidden Valley Lake, California, United States10-21 07:36
  16. 2.119 km SW of Clearlake, California, United States10-30 17:54
  17. 2.016 km E of Cloverdale, California, United States10-07 05:49
  18. 2.016 km ENE of Cloverdale, California, United States10-03 10:00
  19. 2.019 km E of Cloverdale, California, United States10-09 02:24
  20. 2.017 km W of Hidden Valley Lake, California, United States10-12 15:20
  21. 2.019 km SW of Clearlake, California, United States10-24 19:39
  22. 2.018 km E of Cloverdale, California, United States10-03 13:09
  23. 2.017 km WSW of Hidden Valley Lake, California, United States10-15 02:30
  24. 1.920 km E of Cloverdale, California, United States10-12 13:36
  25. 1.918 km E of Cloverdale, California, United States10-01 07:09

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Event id nc75441966. First recorded here 30 Sept 2026, 19:32:38 UTC. Solutions: USGS · NC (usgs:nc75441966). Cite as: SeismoAtlas, “M0.8 earthquake 16 km WSW of Hidden Valley Lake, California, United States”, https://seismoatlas.com/earthquake/nc75441966-m0-8-earthquake-16-km-wsw-of-hidden-valley-lake-california-united-states, data from USGS.

JSON: /api/v1/events/nc75441966. SeismoAtlas is not an official warning service.