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M1.5 earthquake 4 km WSW of Beaumont, California, United States

A magnitude 1.5 earthquake struck 4 km WSW of Beaumont, California, United States at 17:22 local time (00:22 UTC) on 16 Oct 2026, at a depth of 17 km, according to USGS.

Data: USGS · updated 2026-10-18 16:33 UTC · reviewed

Magnitude
1.5micro
local magnitude (Richter) (ml)
Depth
16.6 km
Status
Reviewed
Origin time
2026-10-17 00:22:07 UTC
Local: 16 Oct 2026, 17:22:07 (America/Los Angeles)
Epicentre
33.917° N, 117.016° 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
BeaumontCalifornia, United States · pop. 43,8114 kmINot felt
Cherry ValleyCalifornia, United States · pop. 6,3627 kmINot felt
BanningCalifornia, United States · pop. 30,94513 kmINot felt
YucaipaCalifornia, United States · pop. 53,32813 kmINot felt
San JacintoCalifornia, United States · pop. 46,95116 kmINot felt
RiversideCalifornia, United States · pop. 317,26136 kmINot felt
IrvineCalifornia, United States · pop. 256,92779 kmINot felt
Santa AnaCalifornia, United States · pop. 310,22781 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 Survey1.5 ml16.6 km33.92° N, 117.02° W–Reviewed

How big was it?

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

It released roughly the energy of 3 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 17 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.5 releases about 5.2× the energy of M1.0, and its waves are about 3× taller on a seismogram. Energy: 3 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

158 later earthquakes within 30 km; the largest was M2.4 24 days ago. 32 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.381.016
9.590.75
28.071.116
30.891.510
31.300.912
31.830.712
34.800.59
43.291.615
47.220.916
54.242.416
63.031.317
63.091.317
64.261.117
79.331.411
90.991.014
95.471.216
99.991.117
112.971.015
126.890.94
127.351.04
127.761.34
129.220.95
129.490.95
130.151.213
130.960.713
137.250.89
139.771.05
141.211.113
148.581.84
148.610.96
149.471.05
149.471.55
150.280.715
152.041.34
165.770.613
177.021.16
178.611.04
180.900.815
181.000.99
187.480.514
187.981.013
193.411.613
199.740.811
200.080.76
204.140.611
218.081.217
220.070.417
222.800.612
226.760.512
229.320.68
230.561.214
240.180.813
240.181.011
243.410.92
246.481.012
260.931.217
260.961.618
275.200.514
280.041.14
280.281.26
280.690.512
281.081.34
281.140.85
281.490.69
281.771.010
282.741.15
283.281.15
283.321.85
283.451.14
286.050.85
286.361.07
286.371.34
286.582.05
287.061.33
289.920.614
289.990.94
290.201.14
290.810.84
292.340.83
306.020.818
308.850.94
313.702.24
313.840.94
314.240.516
314.892.26
314.901.37
314.911.04
314.930.94
315.320.94
315.321.23
316.611.36
316.611.87
317.340.65
317.610.73
317.710.68
318.670.54
319.010.96
319.011.06
319.020.74
320.000.84
320.241.24
320.390.93
320.600.75
320.610.75
320.650.54
321.050.96
321.061.65
321.111.06
322.200.85
323.940.74
323.951.14
331.770.97
334.891.04
343.890.613
348.170.76
348.481.25
348.500.95
348.661.08
353.302.16
360.341.117
361.261.04
362.510.65
370.660.316
371.590.75
386.440.89
393.670.69
396.461.713
405.451.113
414.182.014
414.290.612
426.761.915
427.371.514
438.080.413
438.090.916
438.450.713
438.490.714
438.500.616
444.420.817
462.950.716
465.490.714
469.680.99
483.950.514
486.840.617
487.891.04
501.431.316
508.681.513
510.651.017
511.471.016
513.001.16
538.910.520
551.130.917
574.431.417
575.541.55
585.071.18
585.880.99
628.290.917
630.000.414
646.201.313
  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. 2.07 km WSW of Calimesa, California, United States11-03 06:33
  6. 2.0Near Loma Linda, California, United States10-28 22:56
  7. 1.917 km ENE of Banning, California, United States11-03 19:07
  8. 1.8Near Loma Linda, California, United States10-28 19:41
  9. 1.8Near Loma Linda, California, United States10-30 04:58
  10. 1.85 km ESE of Loma Linda, California, United States10-23 04:57
  11. 1.76 km ENE of San Jacinto, California, United States11-02 12:49
  12. 1.616 km NE of Banning, California, United States10-27 21:19
  13. 1.6Near Loma Linda, California, United States10-30 09:25
  14. 1.6Near Loma Linda, California, United States10-18 19:39
  15. 1.65 km SE of Mentone, California, United States10-25 01:46
  16. 1.56 km NNE of Cherry Valley, California, United States11-09 23:54
  17. 1.54 km ESE of Cherry Valley, California, United States11-03 19:44
  18. 1.5Near Loma Linda, California, United States11-07 05:02
  19. 1.516 km ENE of Valle Vista, California, United States10-18 07:15
  20. 1.55 km ESE of Loma Linda, California, United States10-23 05:50
  21. 1.4Near Beaumont, California, United States11-09 22:48
  22. 1.43 km ESE of Nuevo, California, United States10-20 07:41
  23. 1.3Near Loma Linda, California, United States10-19 15:27
  24. 1.34 km SW of Redlands, California, United States10-28 23:25
  25. 1.35 km SW of Redlands, California, United States10-28 22:44

Did you feel it?

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Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id ci10257294. First recorded here 18 Oct 2026, 16:55:59 UTC. Solutions: USGS · CI (usgs:ci10257294). Cite as: SeismoAtlas, “M1.5 earthquake 4 km WSW of Beaumont, California, United States”, https://seismoatlas.com/earthquake/ci10257294-m1-5-earthquake-4-km-wsw-of-beaumont-california-united-states, data from USGS.

JSON: /api/v1/events/ci10257294. SeismoAtlas is not an official warning service.