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M1.0 earthquake near Fontana, California, United States

A magnitude 1.0 earthquake struck near Fontana, California, United States at 09:30 local time (16:30 UTC) on 14 Oct 2026, at a depth of 4 km, according to USGS.

revised from M1.3

Data: USGS · updated 2026-10-14 17:35 UTC · reviewed

Magnitude
1.0micro
local magnitude (Richter) (ml)
revised from 1.3
Depth
4.1 km
Status
Reviewed
Origin time
2026-10-14 16:30:22 UTC
Local: 14 Oct 2026, 09:30:22 (America/Los Angeles)
Epicentre
34.075° N, 117.450° 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. 212,7042 kmINot felt
BloomingtonCalifornia, United States · pop. 23,8515 kmINot felt
Glen AvonCalifornia, United States · pop. 20,1998 kmINot felt
RialtoCalifornia, United States · pop. 103,1328 kmINot felt
RiversideCalifornia, United States · pop. 317,26115 kmINot felt
AnaheimCalifornia, United States · pop. 350,74250 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22753 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 Survey1.0 mlwas 1.24.1 km34.07° N, 117.45° 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 529 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 4 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 1.1× the energy of M1.0, and its waves are about 1.1× taller on a seismogram. Energy: 529 g 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

156 later earthquakes within 30 km; the largest was M2.4 24 days ago. 44 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.0

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
3.671.70
10.030.615
18.051.03
34.150.818
51.421.22
55.381.56
65.450.75
82.281.04
87.160.912
87.690.712
99.161.615
103.090.916
110.102.416
118.891.317
118.951.317
146.881.06
147.101.1-1
154.050.77
168.831.015
179.621.37
182.750.94
183.211.04
183.621.34
185.080.95
185.350.95
186.011.213
203.560.53
204.451.84
204.470.96
205.331.05
205.331.55
206.140.715
207.901.34
209.092.07
209.121.67
209.131.37
210.100.87
218.081.3-1
236.860.99
244.601.13
246.130.71
246.650.89
250.140.78
255.600.811
260.010.611
263.771.48
274.971.012
278.660.612
284.781.67
287.161.06
292.221.02
292.551.4-1
294.670.97
296.040.813
296.041.011
298.050.77
302.341.012
315.540.90
321.131.213
335.911.14
336.141.26
336.941.34
337.000.85
338.601.15
339.151.15
339.191.85
339.311.14
341.910.85
342.221.07
342.231.34
342.442.05
342.751.0-1
342.921.33
345.780.614
345.850.94
346.061.14
346.680.84
348.210.83
362.001.40
364.710.94
369.572.24
369.700.94
369.931.37
370.752.26
370.761.37
370.771.04
370.800.94
371.180.94
371.181.23
372.471.36
372.471.87
373.210.65
373.470.73
373.570.68
374.530.54
374.870.96
374.871.06
374.880.74
375.860.84
376.101.24
376.250.93
376.470.75
376.480.75
376.510.54
376.910.96
376.921.65
376.971.06
378.070.85
379.800.74
379.811.14
384.131.010
386.520.90
387.630.97
390.751.04
393.260.94
393.471.14
399.750.613
400.381.09
404.030.76
404.341.25
404.370.95
409.162.16
413.581.111
417.121.04
418.380.65
426.520.316
427.460.75
441.051.19
494.310.713
494.360.714
503.431.24
509.011.10
518.810.716
531.021.80
538.260.914
538.260.413
542.710.617
543.751.04
544.111.113
550.540.97
555.831.2-1
557.191.40
557.291.316
557.461.60
564.541.513
566.511.017
567.331.016
568.871.16
568.890.915
599.131.011
612.370.87
638.591.113
651.151.08
684.091.110
693.861.69
700.800.91
  1. 2.4Near Loma Linda, California, United States10-19 06:36
  2. 2.2Near Loma Linda, California, United States10-30 02:04
  3. 2.2Near Loma Linda, California, United States10-30 03:15
  4. 2.1Near Loma Linda, California, United States10-31 17:40
  5. 2.04 km WNW of Fontana, California, United States10-23 09:35
  6. 2.0Near Loma Linda, California, United States10-28 22:56
  7. 1.8Near Loma Linda, California, United States10-28 19:41
  8. 1.8Near Loma Linda, California, United States10-30 04:58
  9. 1.85 km ESE of Loma Linda, California, United States10-23 04:57
  10. 1.8Near El Cerrito Corona, California, United States11-05 19:31
  11. 1.7Near El Cerrito Corona, California, United States10-14 20:10
  12. 1.64 km W of Fontana, California, United States10-26 13:17
  13. 1.6Near Loma Linda, California, United States10-30 09:25
  14. 1.64 km ESE of El Cerrito Corona, California, United States11-06 21:57
  15. 1.64 km WNW of Fontana, California, United States10-23 09:37
  16. 1.64 km N of Jurupa Valley, California, United States11-12 14:22
  17. 1.6Near Loma Linda, California, United States10-18 19:39
  18. 1.514 km WNW of Muscoy, California, United States10-16 23:53
  19. 1.5Near Loma Linda, California, United States11-07 05:02
  20. 1.55 km ESE of Loma Linda, California, United States10-23 05:50
  21. 1.4Near El Cerrito Corona, California, United States10-29 18:30
  22. 1.43 km ENE of El Cerrito Corona, California, United States10-26 21:03
  23. 1.46 km NW of Jurupa Valley, California, United States10-25 16:16
  24. 1.4Near Home Gardens, California, United States11-06 21:41
  25. 1.3Near Loma Linda, California, United States10-19 15:27

Did you feel it?

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Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id ci41347551. First recorded here 14 Oct 2026, 16:33:52 UTC. Solutions: USGS · CI (usgs:ci41347551). Cite as: SeismoAtlas, “M1.0 earthquake near Fontana, California, United States”, https://seismoatlas.com/earthquake/ci41347551-m1-0-earthquake-near-fontana-california-united-states, data from USGS.

JSON: /api/v1/events/ci41347551. SeismoAtlas is not an official warning service.