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M1.0 earthquake 30 km SSE of Valle Vista, California, United States

A magnitude 1.0 earthquake struck 30 km SSE of Valle Vista, California, United States at 05:49 local time (12:49 UTC) on 23 Sept 2026, at a depth of 3 km, according to USGS. The solution is preliminary and may be revised.

Data: USGS · updated 2026-09-23 12:53 UTC · automatic solution

Magnitude
1.0micro
local magnitude (Richter) (ml)
Depth
3.4 km
Status
Automatic
Origin time
2026-09-23 12:49:01 UTC
Local: 23 Sept 2026, 05:49:01 (America/Los Angeles)
Epicentre
33.511° 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. 14,57830 kmINot felt
East HemetCalifornia, United States · pop. 17,41831 kmINot felt
HemetCalifornia, United States · pop. 83,86134 kmINot felt
San JacintoCalifornia, United States · pop. 46,95136 kmINot felt
TemeculaCalifornia, United States · pop. 110,00338 kmINot felt
Cathedral CityCalifornia, United States · pop. 53,82639 kmINot felt
RiversideCalifornia, United States · pop. 317,26178 kmINot felt
San DiegoCalifornia, United States · pop. 1,404,45296 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.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · CIheadlineSouthern California Seismic Network via U.S. Geological Survey1.0 ml3.4 km33.51° N, 116.74° W–Automatic

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How big was it?

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

It released roughly the energy of 529 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 3 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: 529 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

77 later earthquakes within 30 km; the largest was M2.3 1 day ago. 30 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.0

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.01-0.14
1.630.16
2.640.35
3.160.812
6.700.612
6.900.67
7.850.313
8.850.512
12.440.714
14.250.612
15.740.411
16.980.312
17.900.613
21.690.712
23.130.412
26.340.96
27.250.313
35.860.312
40.451.112
41.320.412
48.391.114
49.160.66
49.400.616
50.240.613
53.490.312
54.500.313
56.960.512
58.581.15
64.300.514
66.140.95
66.710.315
66.820.612
67.021.112
68.120.315
68.130.015
68.130.615
68.160.414
68.930.37
69.330.412
69.470.06
69.980.212
72.53-0.06
73.430.914
76.970.210
78.050.46
82.140.612
86.671.614
86.681.620
86.682.314
86.691.213
88.180.412
88.260.512
90.40-0.06
91.230.718
92.360.814
94.880.26
95.630.617
95.950.93
96.400.910
97.810.513
98.451.413
101.901.513
106.390.56
107.060.86
109.891.712
109.940.913
110.591.114
111.600.213
114.350.62
120.220.411
121.510.515
121.621.117
123.911.213
124.420.716
126.060.710
126.070.411
131.340.412
  1. 2.326 km SW of La Quinta, California, United States09-27 03:29
  2. 1.723 km SSE of Valle Vista, California, United States09-28 02:42
  3. 1.626 km SW of La Quinta, California, United States09-27 03:29
  4. 1.623 km SSW of La Quinta, California, United States09-27 03:29
  5. 1.525 km SW of La Quinta, California, United States09-27 18:42
  6. 1.424 km E of Temecula, California, United States09-27 15:15
  7. 1.225 km SW of La Quinta, California, United States09-27 03:30
  8. 1.225 km SW of La Quinta, California, United States09-28 16:43
  9. 1.122 km SSE of Valle Vista, California, United States09-25 05:15
  10. 1.116 km SE of Valle Vista, California, United States09-25 13:12
  11. 1.129 km SE of Valle Vista, California, United States09-25 23:23
  12. 1.116 km SE of Valle Vista, California, United States09-28 03:24
  13. 1.120 km ESE of Valle Vista, California, United States09-28 14:25
  14. 1.122 km SSE of Valle Vista, California, United States09-26 07:50
  15. 0.941 km ENE of Valley Center, California, United States09-26 06:57
  16. 0.928 km SSE of Valle Vista, California, United States09-27 12:45
  17. 0.923 km SSE of Valle Vista, California, United States09-28 02:45
  18. 0.934 km ENE of Valley Center, California, United States09-27 13:13
  19. 0.925 km SW of La Quinta, California, United States09-24 15:09
  20. 0.921 km NE of Valley Center, California, United States09-26 14:14
  21. 0.820 km SE of Valle Vista, California, United States09-27 09:10
  22. 0.829 km SE of Valle Vista, California, United States09-27 23:52
  23. 0.822 km SSE of Valle Vista, California, United States09-23 15:58
  24. 0.725 km SW of La Quinta, California, United States09-24 01:15
  25. 0.713 km ESE of Valle Vista, California, United States09-28 17:14

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Reports on SeismoAtlas

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Event id ci41337639. First recorded here 28 Sept 2026, 17:32:11 UTC. Solutions: USGS · CI (usgs:ci41337639). Cite as: SeismoAtlas, “M1.0 earthquake 30 km SSE of Valle Vista, California, United States”, https://seismoatlas.com/earthquake/ci41337639-m1-0-earthquake-30-km-sse-of-valle-vista-california-united-states, data from USGS.

JSON: /api/v1/events/ci41337639. SeismoAtlas is not an official warning service.