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M1.2 earthquake 6 km SSW of Redlands, California, United States

A magnitude 1.2 earthquake struck 6 km SSW of Redlands, California, United States at 03:31 local time (10:31 UTC) on 22 Oct 2026, at a depth of 13 km, according to USGS.

revised from M1.4

Data: USGS · updated 2026-10-22 13:04 UTC · reviewed

Magnitude
1.2micro
local magnitude (Richter) (ml)
revised from 1.4
Depth
12.6 km
Status
Reviewed
Origin time
2026-10-22 10:31:16 UTC
Local: 22 Oct 2026, 03:31:16 (America/Los Angeles)
Epicentre
34.016° N, 117.208° 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
RedlandsCalifornia, United States · pop. 71,0356 kmINot felt
Loma LindaCalifornia, United States · pop. 24,0456 kmINot felt
Moreno ValleyCalifornia, United States · pop. 204,1989 kmINot felt
ColtonCalifornia, United States · pop. 54,62111 kmINot felt
RiversideCalifornia, United States · pop. 317,26119 kmINot felt
AnaheimCalifornia, United States · pop. 350,74268 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22768 kmINot felt
IrvineCalifornia, United States · pop. 256,92768 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 Survey1.2 mlwas 1.412.6 km34.02° N, 117.21° 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 985 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 13 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.2 releases about 2.1× the energy of M1.0, and its waves are about 1.6× taller on a seismogram. Energy: 985 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

127 later earthquakes within 30 km; the largest was M2.2 14 days ago. 24 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.2

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
7.101.114
11.051.113
17.540.53
18.431.84
18.460.96
19.321.05
19.321.55
20.130.715
21.881.34
23.082.07
23.111.67
23.121.37
24.090.87
50.850.99
58.581.13
60.110.71
60.630.89
63.261.613
69.590.811
69.930.76
73.990.611
92.650.612
98.771.67
99.170.68
101.151.06
106.211.02
108.660.97
110.030.813
110.031.011
112.030.77
113.250.92
116.331.012
135.111.213
145.140.36
149.891.14
150.131.26
150.931.34
150.980.85
152.581.15
153.131.15
153.171.85
153.301.14
155.900.85
156.211.07
156.221.34
156.422.05
156.911.33
159.770.614
159.840.94
160.051.14
160.660.84
162.190.83
178.700.94
183.552.24
183.690.94
184.742.26
184.751.37
184.761.04
184.780.94
185.170.94
185.171.23
186.451.36
186.461.87
187.190.65
187.460.73
187.550.68
188.510.54
188.850.96
188.851.06
188.860.74
189.850.84
190.091.24
190.230.93
190.450.75
190.460.75
190.490.54
190.900.96
190.911.65
190.961.06
192.050.85
193.780.74
193.791.14
198.111.010
201.620.97
204.741.04
213.730.613
214.361.09
218.010.76
218.321.25
218.350.95
218.511.08
223.152.16
231.111.04
232.360.65
240.500.316
241.440.75
275.301.113
284.032.014
284.140.612
297.221.514
307.930.413
307.940.916
308.290.713
308.340.714
314.260.817
332.800.716
339.530.99
356.690.617
357.741.04
371.271.316
378.521.513
380.491.017
381.321.016
382.851.16
382.870.915
420.980.917
426.350.87
444.281.417
445.391.55
452.581.113
454.921.18
455.730.99
465.131.08
471.390.93
498.140.917
499.850.414
507.851.69
  1. 2.2Near Loma Linda, California, United States10-30 02:04
  2. 2.2Near Loma Linda, California, United States10-30 03:15
  3. 2.1Near Loma Linda, California, United States10-31 17:40
  4. 2.04 km WNW of Fontana, California, United States10-23 09:35
  5. 2.07 km WSW of Calimesa, California, United States11-03 06:33
  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. 1.64 km W of Fontana, California, United States10-26 13:17
  11. 1.6Near Loma Linda, California, United States10-30 09:25
  12. 1.64 km WNW of Fontana, California, United States10-23 09:37
  13. 1.64 km N of Jurupa Valley, California, United States11-12 14:22
  14. 1.65 km SE of Mentone, California, United States10-25 01:46
  15. 1.56 km NNE of Cherry Valley, California, United States11-09 23:54
  16. 1.54 km ESE of Cherry Valley, California, United States11-03 19:44
  17. 1.5Near Loma Linda, California, United States11-07 05:02
  18. 1.55 km ESE of Loma Linda, California, United States10-23 05:50
  19. 1.4Near Beaumont, California, United States11-09 22:48
  20. 1.34 km SW of Redlands, California, United States10-28 23:25
  21. 1.35 km SW of Redlands, California, United States10-28 22:44
  22. 1.35 km SW of Redlands, California, United States10-23 08:24
  23. 1.36 km SSW of Redlands, California, United States11-06 21:47
  24. 1.3Near Loma Linda, California, United States10-30 03:16
  25. 1.3Near Loma Linda, California, United States10-30 04:58

Did you feel it?

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Reports on SeismoAtlas

No reports yet.

Event id ci41350423. First recorded here 22 Oct 2026, 10:34:41 UTC. Solutions: USGS · CI (usgs:ci41350423). Cite as: SeismoAtlas, “M1.2 earthquake 6 km SSW of Redlands, California, United States”, https://seismoatlas.com/earthquake/ci41350423-m1-2-earthquake-6-km-ssw-of-redlands-california-united-states, data from USGS.

JSON: /api/v1/events/ci41350423. SeismoAtlas is not an official warning service.