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M1.7 earthquake near Cherry Valley, California, United States

A magnitude 1.7 earthquake struck near Cherry Valley, California, United States at 18:51 local time (01:51 UTC) on 8 Oct 2026, at a depth of 8 km, according to USGS.

Data: USGS · updated 2026-10-09 21:56 UTC · reviewed

Magnitude
1.7micro
local magnitude (Richter) (ml)
Depth
8.2 km
Status
Reviewed
Origin time
2026-10-09 01:51:00 UTC
Local: 8 Oct 2026, 18:51:00 (America/Los Angeles)
Epicentre
33.964° N, 116.963° 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
Cherry ValleyCalifornia, United States · pop. 6,3622 kmINot felt
BeaumontCalifornia, United States · pop. 43,8114 kmINot felt
BanningCalifornia, United States · pop. 30,9459 kmINot felt
YucaipaCalifornia, United States · pop. 53,32810 kmINot felt
San JacintoCalifornia, United States · pop. 46,95120 kmINot felt
RiversideCalifornia, United States · pop. 317,26140 kmINot felt
IrvineCalifornia, United States · pop. 256,92786 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22787 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 · CI, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · CIheadlineSouthern California Seismic Network via U.S. Geological Survey1.7 mlwas 1.78.2 km33.96° N, 116.96° W–Reviewed · 2 revisions

How big was it?

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

It released roughly the energy of 5 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 8 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.7 releases about 10× the energy of M1.0, and its waves are about 4.7× taller on a seismogram. Energy: 5 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

181 later earthquakes within 30 km; the largest was M2.8 28 days ago. 29 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.7

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
3.581.217
22.471.612
23.010.911
28.141.918
28.451.014
29.070.85
38.220.610
40.810.96
49.571.014
53.391.115
54.222.712
60.690.812
72.610.819
83.060.918
83.990.316
84.920.914
87.111.18
94.450.415
99.800.818
123.050.613
125.971.715
130.650.710
137.490.69
144.690.615
145.672.814
145.870.812
146.032.214
160.940.813
168.810.818
175.052.417
189.001.516
190.511.717
190.521.517
190.901.016
200.110.75
218.591.116
221.411.510
221.820.912
222.340.712
225.320.59
233.811.615
237.740.916
244.762.416
253.551.317
253.611.317
254.781.117
269.851.411
281.511.014
285.991.216
290.511.117
303.481.015
317.400.94
317.871.04
318.271.34
319.740.95
320.010.95
320.671.213
327.771.114
327.770.89
331.721.113
339.101.84
339.130.96
339.991.05
339.991.55
340.800.715
342.551.34
356.290.613
367.541.16
369.131.04
371.420.815
371.520.99
378.000.514
378.501.013
383.931.613
390.260.811
390.600.76
394.660.611
410.590.417
413.320.612
417.280.512
419.840.68
421.081.214
430.700.813
430.701.011
433.930.92
437.001.012
451.451.217
451.481.618
465.720.514
470.561.14
470.801.26
471.210.512
471.601.34
471.660.85
472.000.69
472.291.010
473.261.15
473.801.15
473.841.85
473.971.14
476.570.85
476.881.07
476.891.34
477.102.05
477.581.33
480.440.614
480.510.94
480.721.14
481.330.84
482.860.83
485.230.515
496.540.818
499.370.94
504.222.24
504.360.94
504.760.516
505.412.26
505.421.37
505.431.04
505.450.94
505.840.94
505.841.23
507.121.36
507.131.87
507.860.65
508.130.73
508.220.68
509.180.54
509.520.96
509.521.06
509.530.74
510.520.84
510.761.24
510.900.93
511.120.75
511.130.75
511.170.54
511.570.96
511.581.65
511.631.06
512.720.85
514.460.74
514.461.14
522.290.97
525.411.04
534.410.613
538.680.76
538.991.25
539.020.95
539.181.08
543.822.16
550.861.117
551.781.04
553.030.65
561.180.316
562.110.75
576.960.89
584.190.69
586.981.713
595.971.113
604.702.014
604.810.612
617.271.915
617.891.514
628.600.413
628.610.916
628.970.713
629.010.714
629.010.616
634.930.817
653.470.716
656.010.714
660.200.99
674.470.514
677.360.617
678.411.04
691.941.316
699.201.513
701.161.017
701.991.016
703.521.16
  1. 2.83 km N of San Jacinto, California, United States10-15 03:30
  2. 2.74 km E of San Jacinto, California, United States10-11 08:04
  3. 2.4Near Loma Linda, California, United States10-19 06:36
  4. 2.43 km NW of Calimesa, California, United States10-16 08:53
  5. 2.2Near Loma Linda, California, United States10-30 02:04
  6. 2.2Near Loma Linda, California, United States10-30 03:15
  7. 2.23 km N of San Jacinto, California, United States10-15 03:52
  8. 2.1Near Loma Linda, California, United States10-31 17:40
  9. 2.07 km WSW of Calimesa, California, United States11-03 06:33
  10. 2.0Near Loma Linda, California, United States10-28 22:56
  11. 1.917 km ENE of Banning, California, United States11-03 19:07
  12. 1.95 km ESE of Yucaipa, California, United States10-10 05:59
  13. 1.8Near Loma Linda, California, United States10-28 19:41
  14. 1.8Near Loma Linda, California, United States10-30 04:58
  15. 1.85 km ESE of Loma Linda, California, United States10-23 04:57
  16. 1.7Near Redlands, California, United States10-14 07:49
  17. 1.76 km ENE of San Jacinto, California, United States11-02 12:49
  18. 1.74 km WSW of Beaumont, California, United States10-17 00:21
  19. 1.622 km SSE of Big Bear City, California, United States10-10 00:19
  20. 1.616 km NE of Banning, California, United States10-27 21:19
  21. 1.6Near Loma Linda, California, United States10-30 09:25
  22. 1.6Near Loma Linda, California, United States10-18 19:39
  23. 1.65 km SE of Mentone, California, United States10-25 01:46
  24. 1.515 km W of Desert Hot Springs, California, United States10-16 22:50
  25. 1.54 km ESE of Cherry Valley, California, United States11-03 19:44

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id ci41345335. First recorded here 9 Oct 2026, 01:54:27 UTC. Solutions: USGS · CI (usgs:ci41345335). Cite as: SeismoAtlas, “M1.7 earthquake near Cherry Valley, California, United States”, https://seismoatlas.com/earthquake/ci41345335-m1-7-earthquake-near-cherry-valley-california-united-states, data from USGS.

JSON: /api/v1/events/ci41345335. SeismoAtlas is not an official warning service.