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M1.4 earthquake 5 km W of Fontana, California, United States

A magnitude 1.4 earthquake struck 5 km W of Fontana, California, United States at 01:08 local time (08:08 UTC) on 8 Oct 2026, at a depth of 7 km, according to USGS.

revised from M1.4

Data: USGS · updated 2026-10-08 15:43 UTC · reviewed

Magnitude
1.4micro
local magnitude (Richter) (ml)
revised from 1.4
Depth
6.7 km
Status
Reviewed
Origin time
2026-10-08 08:08:53 UTC
Local: 8 Oct 2026, 01:08:53 (America/Los Angeles)
Epicentre
34.098° N, 117.488° 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
FontanaCalifornia, United States · pop. 212,7045 kmINot felt
BloomingtonCalifornia, United States · pop. 23,8519 kmINot felt
Rancho CucamongaCalifornia, United States · pop. 175,2369 kmINot felt
Glen AvonCalifornia, United States · pop. 20,19910 kmINot felt
RiversideCalifornia, United States · pop. 317,26118 kmINot felt
AnaheimCalifornia, United States · pop. 350,74248 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22752 kmINot felt
IrvineCalifornia, United States · pop. 256,92757 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 Survey1.4 mlwas 1.46.7 km34.10° N, 117.49° W–Reviewed · 1 revision

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 7 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 3.5× the energy of M1.0, and its waves are about 2.3× 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

180 later earthquakes within 30 km; the largest was M2.7 35 days ago. 34 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.4

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.002.76
0.271.16
1.881.07
2.101.27
2.440.77
2.520.87
2.520.97
2.671.27
3.660.47
3.711.05
4.270.67
6.351.16
7.250.76
7.671.816
8.320.55
8.360.97
8.520.87
21.281.217
24.230.75
26.220.87
27.081.78
37.671.75
40.710.911
46.161.014
46.770.85
53.990.914
57.691.516
67.271.014
71.101.115
90.961.13
100.760.918
102.620.914
111.921.54
112.160.415
143.681.715
152.361.04
156.021.70
162.390.615
170.411.03
203.781.22
207.741.56
217.810.75
234.641.04
251.511.615
255.440.916
262.462.416
271.251.317
271.311.317
299.241.06
299.461.1-1
306.410.77
321.191.015
331.971.37
335.110.94
335.571.04
335.981.34
337.440.95
337.710.95
338.371.213
355.920.53
356.801.84
356.830.96
357.691.05
357.691.55
358.500.715
360.261.34
361.452.07
361.481.67
361.491.37
362.460.87
370.441.3-1
389.220.99
396.961.13
398.480.71
399.000.89
402.500.78
407.960.811
412.370.611
416.131.48
427.331.012
431.020.612
437.141.67
439.521.06
444.581.02
444.911.4-1
447.030.97
448.400.813
448.401.011
450.410.77
454.701.012
464.130.98
467.900.90
473.481.213
488.261.14
488.501.26
489.301.34
489.360.85
490.961.15
491.511.15
491.541.85
491.671.14
494.270.85
494.581.07
494.591.34
494.802.05
495.111.0-1
495.281.33
498.140.614
498.210.94
498.421.14
499.040.84
500.560.83
514.361.40
517.070.94
521.922.24
522.060.94
522.291.37
523.112.26
523.121.37
523.131.04
523.150.94
523.540.94
523.541.23
524.831.36
524.831.87
525.560.65
525.830.73
525.930.68
526.890.54
527.230.96
527.231.06
527.240.74
528.220.84
528.461.24
528.610.93
528.820.75
528.840.75
528.870.54
529.270.96
529.281.65
529.331.06
530.430.85
532.160.74
532.171.14
536.481.010
538.880.90
539.990.97
543.111.04
545.620.94
545.831.14
550.590.913
552.741.09
556.390.76
556.701.25
556.730.95
561.522.16
565.931.111
569.481.04
570.730.65
578.880.316
579.810.75
593.411.19
646.670.713
646.720.714
655.781.24
661.371.10
671.170.716
683.381.80
690.620.914
690.620.413
695.060.617
696.111.04
696.471.113
702.900.97
708.191.2-1
709.551.40
709.651.316
716.901.513
718.871.017
719.691.016
  1. 2.74 km WNW of Fontana, California, United States10-08 08:09
  2. 2.4Near Loma Linda, California, United States10-19 06:36
  3. 2.2Near Loma Linda, California, United States10-30 02:04
  4. 2.2Near Loma Linda, California, United States10-30 03:15
  5. 2.1Near Loma Linda, California, United States10-31 17:40
  6. 2.04 km WNW of Fontana, California, United States10-23 09:35
  7. 2.0Near Loma Linda, California, United States10-28 22:56
  8. 1.8Near Loma Linda, California, United States10-28 19:41
  9. 1.8Near Loma Linda, California, United States10-30 04:58
  10. 1.8Near Colton, California, United States10-08 15:49
  11. 1.85 km ESE of Loma Linda, California, United States10-23 04:57
  12. 1.8Near El Cerrito Corona, California, United States11-05 19:31
  13. 1.77 km WNW of Jurupa Valley, California, United States10-09 21:48
  14. 1.7Near Redlands, California, United States10-14 07:49
  15. 1.7Near El Cerrito Corona, California, United States10-14 20:10
  16. 1.714 km NNE of Rancho Cucamonga, California, United States10-09 11:13
  17. 1.64 km W of Fontana, California, United States10-26 13:17
  18. 1.6Near Loma Linda, California, United States10-30 09:25
  19. 1.64 km WNW of Fontana, California, United States10-23 09:37
  20. 1.6Near Loma Linda, California, United States10-18 19:39
  21. 1.5Near Colton, California, United States10-10 17:50
  22. 1.514 km WNW of Muscoy, California, United States10-16 23:53
  23. 1.5Near Fontana, California, United States10-13 00:04
  24. 1.5Near Loma Linda, California, United States11-07 05:02
  25. 1.55 km ESE of Loma Linda, California, United States10-23 05:50

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 ci41344847. First recorded here 8 Oct 2026, 08:12:49 UTC. Solutions: USGS · CI (usgs:ci41344847). Cite as: SeismoAtlas, “M1.4 earthquake 5 km W of Fontana, California, United States”, https://seismoatlas.com/earthquake/ci41344847-m1-4-earthquake-5-km-w-of-fontana-california-united-states, data from USGS.

JSON: /api/v1/events/ci41344847. SeismoAtlas is not an official warning service.