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SeismoAtlas

M1.5 earthquake 16 km ENE of Valle Vista, California, United States

A magnitude 1.5 earthquake struck 16 km ENE of Valle Vista, California, United States at 00:15 local time (07:15 UTC) on 18 Oct 2026, at a depth of 10 km, according to USGS.

revised from M1.6

Data: USGS · updated 2026-10-18 14:05 UTC · reviewed

Magnitude
1.5micro
local magnitude (Richter) (ml)
revised from 1.6
Depth
9.6 km
Status
Reviewed
Origin time
2026-10-18 07:15:30 UTC
Local: 18 Oct 2026, 00:15:30 (America/Los Angeles)
Epicentre
33.822° N, 116.743° 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
Valle VistaCalifornia, United States · pop. 14,57816 kmINot felt
BanningCalifornia, United States · pop. 30,94517 kmINot felt
Palm SpringsCalifornia, United States · pop. 47,37118 kmINot felt
San JacintoCalifornia, United States · pop. 46,95121 kmINot felt
HemetCalifornia, United States · pop. 83,86122 kmINot felt
RiversideCalifornia, United States · pop. 317,26162 kmINot felt
IrvineCalifornia, United States · pop. 256,927101 kmINot felt
Santa AnaCalifornia, United States · pop. 310,227104 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 mlwas 1.69.6 km33.82° N, 116.74° 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 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 10 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

137 later earthquakes within 30 km; the largest was M2.2 16 days ago. 55 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.920.914
3.910.59
6.900.512
13.830.611
14.440.814
17.600.612
29.330.411
30.250.712
33.371.117
34.620.712
37.840.913
42.660.814
51.790.514
64.581.216
69.180.415
69.280.714
86.740.113
92.400.415
92.650.614
96.030.413
96.030.212
106.360.89
108.881.05
110.321.113
116.960.417
118.600.515
128.700.913
131.831.113
132.000.512
133.970.36
146.131.16
147.721.04
149.900.414
149.900.514
150.010.815
156.600.514
157.091.013
175.190.36
177.070.515
177.130.612
186.401.012
186.890.718
187.150.46
187.191.217
189.190.417
195.77-0.16
195.870.512
199.671.214
207.331.719
211.002.212
211.91-0.013
216.530.217
221.890.512
226.890.615
230.041.217
230.071.618
241.670.512
244.310.514
249.800.512
250.600.69
250.881.010
251.091.016
263.820.515
265.901.113
265.950.113
266.941.213
272.960.913
273.230.512
275.130.818
283.350.516
284.551.011
290.070.614
291.770.516
291.800.414
309.760.515
310.560.918
317.781.08
322.13-0.25
322.360.516
327.160.516
329.451.117
333.210.417
339.430.313
351.110.616
355.550.89
361.950.76
362.780.69
364.170.914
365.571.713
382.380.112
384.210.06
392.110.313
395.871.915
396.481.514
400.170.512
407.190.413
407.200.916
407.610.616
410.340.813
417.211.416
424.800.814
434.600.714
438.790.99
453.060.514
466.120.712
474.680.913
476.520.612
484.560.715
499.620.412
501.550.46
501.550.16
508.020.520
523.630.717
530.860.913
531.070.210
540.660.416
543.541.417
544.651.55
549.440.411
550.960.716
550.960.61
554.181.18
554.990.99
555.250.315
556.690.617
564.010.612
564.170.812
565.161.115
565.801.413
565.850.712
590.320.916
594.501.312
594.501.212
594.820.717
597.410.917
599.110.414
615.311.313
  1. 2.222 km SSE of Valle Vista, California, United States10-27 02:15
  2. 1.917 km ENE of Banning, California, United States11-03 19:07
  3. 1.76 km ENE of San Jacinto, California, United States11-02 12:49
  4. 1.714 km SE of Valle Vista, California, United States10-26 22:35
  5. 1.616 km NE of Banning, California, United States10-27 21:19
  6. 1.56 km NNE of Cherry Valley, California, United States11-09 23:54
  7. 1.54 km ESE of Cherry Valley, California, United States11-03 19:44
  8. 1.417 km ESE of Valle Vista, California, United States11-04 16:28
  9. 1.4Near Beaumont, California, United States11-09 22:48
  10. 1.422 km SSE of Valle Vista, California, United States11-10 21:03
  11. 1.318 km NE of Banning, California, United States11-12 22:33
  12. 1.322 km SSE of Valle Vista, California, United States11-12 01:45
  13. 1.216 km NE of Banning, California, United States10-27 21:18
  14. 1.223 km SSE of Valle Vista, California, United States10-29 10:12
  15. 1.27 km SE of Valle Vista, California, United States10-26 02:26
  16. 1.213 km ESE of Banning, California, United States10-20 23:50
  17. 1.28 km NE of Banning, California, United States10-26 14:55
  18. 1.222 km SSE of Valle Vista, California, United States11-12 01:45
  19. 1.1Near San Jacinto, California, United States10-24 09:23
  20. 1.1Near Cherry Valley, California, United States11-10 09:26
  21. 1.14 km NNE of Banning, California, United States11-01 00:42
  22. 1.15 km NE of Cherry Valley, California, United States10-22 21:34
  23. 1.118 km ENE of Banning, California, United States11-10 20:25
  24. 1.125 km SW of Cathedral City, California, United States10-23 19:05
  25. 1.19 km NNE of Banning, California, United States10-19 16:37

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 ci41348823. First recorded here 18 Oct 2026, 07:18:28 UTC. Solutions: USGS · CI (usgs:ci41348823). Cite as: SeismoAtlas, “M1.5 earthquake 16 km ENE of Valle Vista, California, United States”, https://seismoatlas.com/earthquake/ci41348823-m1-5-earthquake-16-km-ene-of-valle-vista-california-united-states, data from USGS.

JSON: /api/v1/events/ci41348823. SeismoAtlas is not an official warning service.