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SeismoAtlas

M1.1 earthquake 13 km NE of Yucaipa, California, United States

A magnitude 1.1 earthquake struck 13 km NE of Yucaipa, California, United States at 09:57 local time (16:57 UTC) on 12 Oct 2026, at a depth of 8 km, according to USGS.

revised from M1.2

Data: USGS · updated 2026-10-12 18:44 UTC · reviewed

Magnitude
1.1micro
local magnitude (Richter) (ml)
revised from 1.2
Depth
8.2 km
Status
Reviewed
Origin time
2026-10-12 16:57:28 UTC
Local: 12 Oct 2026, 09:57:28 (America/Los Angeles)
Epicentre
34.101° N, 116.923° 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
YucaipaCalifornia, United States · pop. 53,32813 kmINot felt
Big Bear LakeCalifornia, United States · pop. 5,21315 kmINot felt
BanningCalifornia, United States · pop. 30,94519 kmINot felt
BeaumontCalifornia, United States · pop. 43,81120 kmINot felt
RedlandsCalifornia, United States · pop. 71,03524 kmINot felt
RiversideCalifornia, United States · pop. 317,26147 kmINot felt
AnaheimCalifornia, United States · pop. 350,74296 kmINot felt
IrvineCalifornia, United States · pop. 256,92796 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 Survey1.1 mlwas 1.18.2 km34.10° N, 116.92° 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 607 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 8 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.1 releases about 1.3× the energy of M1.0, and its waves are about 1.2× taller on a seismogram. Energy: 607 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

106 later earthquakes within 30 km; the largest was M2.4 27 days ago. 24 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.1

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
12.690.818
35.940.613
35.950.82
38.871.715
43.550.710
50.380.69
57.580.615
68.181.37
73.830.813
81.700.818
87.942.417
101.891.516
103.411.717
103.411.517
113.000.75
123.051.14
131.481.116
138.210.59
157.540.71
166.441.317
166.501.317
167.671.117
194.401.014
198.881.216
203.401.117
230.300.94
230.761.04
231.171.34
232.630.95
232.900.95
233.561.213
240.661.114
240.660.89
244.621.113
251.991.84
252.020.96
252.881.05
252.881.55
253.690.715
255.451.34
269.180.613
282.021.04
284.410.99
291.391.013
296.821.613
323.490.417
330.170.512
332.730.68
333.971.214
346.820.92
364.341.217
364.371.618
378.610.514
378.700.36
383.451.14
383.691.26
384.491.34
384.900.69
385.181.010
386.151.15
386.701.15
386.861.14
389.771.07
389.781.34
390.471.33
395.750.83
398.120.515
409.440.818
424.521.06
427.350.74
451.920.95
452.081.08
463.751.117
475.270.99
489.850.89
491.601.18
497.090.69
508.861.113
515.860.51
517.592.014
517.710.612
517.740.81
530.171.915
530.190.82
530.791.514
531.241.51
541.490.413
541.500.916
541.860.713
541.910.714
541.910.616
547.830.817
568.900.714
573.090.99
587.360.514
590.250.617
591.301.04
604.841.316
642.320.520
657.930.717
677.841.417
678.951.55
688.481.18
689.290.99
699.461.115
704.950.93
  1. 2.43 km NW of Calimesa, California, United States10-16 08:53
  2. 2.07 km WSW of Calimesa, California, United States11-03 06:33
  3. 1.917 km ENE of Banning, California, United States11-03 19:07
  4. 1.85 km ESE of Loma Linda, California, United States10-23 04:57
  5. 1.7Near Redlands, California, United States10-14 07:49
  6. 1.74 km WSW of Beaumont, California, United States10-17 00:21
  7. 1.616 km NE of Banning, California, United States10-27 21:19
  8. 1.65 km SE of Mentone, California, United States10-25 01:46
  9. 1.515 km W of Desert Hot Springs, California, United States10-16 22:50
  10. 1.56 km NNE of Cherry Valley, California, United States11-09 23:54
  11. 1.54 km ESE of Cherry Valley, California, United States11-03 19:44
  12. 1.510 km ESE of Big Bear City, California, United States11-03 20:11
  13. 1.54 km WSW of Beaumont, California, United States10-17 00:22
  14. 1.55 km ESE of Loma Linda, California, United States10-23 05:50
  15. 1.4Near Beaumont, California, United States11-09 22:48
  16. 1.3Near Loma Linda, California, United States10-19 15:27
  17. 1.34 km SW of Redlands, California, United States10-28 23:25
  18. 1.35 km SW of Redlands, California, United States10-28 22:44
  19. 1.35 km SW of Redlands, California, United States10-23 08:24
  20. 1.36 km SSW of Redlands, California, United States11-06 21:47
  21. 1.35 km NW of Big Bear Lake, California, United States10-15 13:08
  22. 1.33 km SE of Loma Linda, California, United States10-19 15:24
  23. 1.34 km SW of Redlands, California, United States10-28 17:26
  24. 1.35 km ESE of Loma Linda, California, United States10-22 08:07
  25. 1.216 km NE of Banning, California, United States10-27 21:18

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 ci41346815. First recorded here 12 Oct 2026, 17:00:53 UTC. Solutions: USGS · CI (usgs:ci41346815). Cite as: SeismoAtlas, “M1.1 earthquake 13 km NE of Yucaipa, California, United States”, https://seismoatlas.com/earthquake/ci41346815-m1-1-earthquake-13-km-ne-of-yucaipa-california-united-states, data from USGS.

JSON: /api/v1/events/ci41346815. SeismoAtlas is not an official warning service.