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M1.0 earthquake 19 km ESE of Valle Vista, California, United States

A magnitude 1.0 earthquake struck 19 km ESE of Valle Vista, California, United States at 11:20 local time (18:20 UTC) on 28 Oct 2026, at a depth of 16 km, according to USGS.

revised from M1.1

Data: USGS · updated 2026-10-29 19:24 UTC · reviewed

Magnitude
1.0micro
local magnitude (Richter) (ml)
revised from 1.1
Depth
15.6 km
Status
Reviewed
Origin time
2026-10-28 18:20:38 UTC
Local: 28 Oct 2026, 11:20:38 (America/Los Angeles)
Epicentre
33.682° N, 116.701° 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. 14,57819 kmINot felt
Palm SpringsCalifornia, United States · pop. 47,37122 kmINot felt
Cathedral CityCalifornia, United States · pop. 53,82624 kmINot felt
HemetCalifornia, United States · pop. 83,86126 kmINot felt
San JacintoCalifornia, United States · pop. 46,95126 kmINot felt
RiversideCalifornia, United States · pop. 317,26171 kmINot felt
IrvineCalifornia, United States · pop. 256,927104 kmINot felt
Santa AnaCalifornia, United States · pop. 310,227108 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 0.915.6 km33.68° N, 116.70° 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 415 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 16 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: 477 g of TNT vs 415 g of TNT.

Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

165 later earthquakes within 30 km; the largest was M1.8 11 days ago. 89 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.0

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
14.821.113
14.870.113
14.920.16
15.861.213
15.970.96
18.901.15
21.610.26
21.880.913
22.120.66
22.140.512
22.620.514
22.790.16
24.640.66
25.960.14
31.050.15
32.260.516
33.020.26
33.24-0.06
33.461.011
34.591.114
38.980.614
40.680.516
40.720.414
41.210.16
41.240.76
43.920.46
58.680.515
58.990.26
59.470.918
60.511.47
60.62-0.17
62.420.26
63.380.311
64.640.814
69.160.26
71.040.16
71.05-0.25
71.270.516
75.100.414
75.710.66
76.080.516
77.390.44
80.570.66
82.120.417
83.440.612
87.94-0.26
88.350.313
89.030.55
93.321.86
93.620.56
97.180.26
98.580.87
99.890.26
100.030.616
110.870.76
111.351.211
111.95-0.06
111.950.16
113.090.914
114.481.713
119.180.913
121.620.36
121.881.110
122.391.014
128.920.612
130.500.16
131.290.112
133.130.06
138.880.16
139.870.06
140.490.712
141.030.313
141.110.07
141.120.515
148.07-0.37
149.080.512
156.520.616
159.250.813
161.971.014
162.410.46
165.070.36
166.121.416
167.910.36
171.821.013
172.10-0.26
173.720.814
174.180.813
175.300.712
178.210.16
178.800.510
182.830.57
183.520.714
183.670.36
185.540.54
193.610.85
195.220.76
199.120.36
200.091.06
201.980.514
202.080.66
206.060.16
211.200.26
213.780.35
215.030.712
222.07-0.17
223.590.913
225.430.612
233.480.715
236.091.113
243.690.27
247.570.27
248.540.412
249.030.74
250.470.46
250.470.16
251.030.712
251.420.56
263.420.713
265.171.16
266.280.713
266.291.014
268.520.510
276.250.66
279.770.913
279.990.210
283.351.213
284.260.613
284.260.713
285.040.514
287.771.06
287.850.76
289.570.416
295.480.26
298.350.411
299.880.716
299.880.61
301.720.94
302.870.26
303.190.613
303.640.811
304.170.315
305.610.617
306.890.27
312.930.612
313.090.812
314.330.36
314.721.413
314.770.712
317.700.66
323.270.35
326.620.36
333.300.813
336.700.44
338.830.26
339.240.916
343.411.312
343.411.212
343.740.717
343.830.514
344.320.16
346.190.16
354.290.96
355.410.54
358.640.44
359.140.37
  1. 1.822 km SW of La Quinta, California, United States11-01 15:39
  2. 1.76 km ENE of San Jacinto, California, United States11-02 12:49
  3. 1.417 km ESE of Valle Vista, California, United States11-04 16:28
  4. 1.422 km SSE of Valle Vista, California, United States11-10 21:03
  5. 1.429 km SE of Valle Vista, California, United States10-31 06:51
  6. 1.322 km SSE of Valle Vista, California, United States11-12 01:45
  7. 1.223 km SSE of Valle Vista, California, United States10-29 10:12
  8. 1.218 km ENE of Temecula, California, United States11-02 09:41
  9. 1.225 km SW of La Quinta, California, United States11-09 13:41
  10. 1.222 km SSE of Valle Vista, California, United States11-12 01:45
  11. 1.113 km SSW of Hemet, California, United States11-07 14:26
  12. 1.113 km SSW of Hemet, California, United States10-30 04:55
  13. 1.130 km SSE of Valle Vista, California, United States11-02 20:13
  14. 1.129 km SE of Valle Vista, California, United States10-29 13:14
  15. 1.122 km SW of La Quinta, California, United States11-08 19:31
  16. 1.123 km SE of Valle Vista, California, United States10-29 09:09
  17. 1.027 km SW of La Quinta, California, United States11-04 22:09
  18. 1.025 km SW of La Quinta, California, United States11-08 20:37
  19. 1.014 km SSE of Valle Vista, California, United States10-30 03:48
  20. 1.023 km SW of La Quinta, California, United States11-02 20:44
  21. 1.024 km SW of La Quinta, California, United States11-04 12:18
  22. 1.029 km SE of Valle Vista, California, United States11-09 18:07
  23. 1.029 km SE of Valle Vista, California, United States11-06 02:26
  24. 0.916 km ESE of Valle Vista, California, United States10-29 16:13
  25. 0.919 km SE of Valle Vista, California, United States11-02 11:25

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 ci41568360. First recorded here 28 Oct 2026, 18:23:12 UTC. Solutions: USGS · CI (usgs:ci41568360). Cite as: SeismoAtlas, “M1.0 earthquake 19 km ESE of Valle Vista, California, United States”, https://seismoatlas.com/earthquake/ci41568360-m1-0-earthquake-19-km-ese-of-valle-vista-california-united-states, data from USGS.

JSON: /api/v1/events/ci41568360. SeismoAtlas is not an official warning service.