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M1.0 earthquake 31 km WSW of Oasis, California, United States

A magnitude 1.0 earthquake struck 31 km WSW of Oasis, California, United States at 03:10 local time (10:10 UTC) on 22 Sept 2026, at a depth of 9 km, according to USGS.

Data: USGS · updated 2026-09-22 13:17 UTC · reviewed

Magnitude
1.0micro
local magnitude (Richter) (ml)
Depth
8.8 km
Status
Reviewed
Origin time
2026-09-22 10:10:01 UTC
Local: 22 Sept 2026, 03:10:01 (America/Los Angeles)
Epicentre
33.336° N, 116.395° 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
OasisCalifornia, United States · pop. 6,89031 kmINot felt
La QuintaCalifornia, United States · pop. 40,47637 kmINot felt
Palm DesertCalifornia, United States · pop. 51,86943 kmINot felt
CoachellaCalifornia, United States · pop. 44,63544 kmINot felt
IndioCalifornia, United States · pop. 87,53346 kmINot felt
San DiegoCalifornia, United States · pop. 1,404,45299 kmINot felt
Chula VistaCalifornia, United States · pop. 265,757100 kmINot felt
TijuanaBaja California, Mexico · pop. 1,922,523109 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 ml8.8 km33.34° N, 116.39° W–Reviewed

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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 511 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 9 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× taller on a seismogram. Energy: 511 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

50 later earthquakes within 30 km; the largest was M2.3 2 days ago. 8 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.0

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
10.140.77
17.290.214
18.370.716
18.481.28
19.200.86
20.040.86
20.500.17
21.891.513
23.071.58
29.011.513
30.010.59
33.350.612
35.350.79
39.090.714
43.490.79
43.970.810
45.541.611
45.580.79
45.620.69
45.692.010
49.780.412
52.990.96
56.250.79
56.790.67
63.610.811
87.260.411
91.300.66
92.790.95
95.580.37
99.18-0.06
103.620.210
113.321.614
113.331.620
113.332.314
113.341.213
123.050.910
124.460.513
126.670.611
128.551.513
137.201.211
141.000.62
145.490.66
145.920.710
150.561.213
150.940.611
150.950.313
151.740.811
152.710.710
152.720.411
157.990.412
  1. 2.326 km SW of La Quinta, California, United States09-27 03:29
  2. 2.026 km SW of Oasis, California, United States09-24 07:51
  3. 1.626 km SW of Oasis, California, United States09-24 07:42
  4. 1.626 km SW of La Quinta, California, United States09-27 03:29
  5. 1.623 km SSW of La Quinta, California, United States09-27 03:29
  6. 1.536 km SW of La Quinta, California, United States09-23 09:14
  7. 1.530 km WSW of Oasis, California, United States09-23 15:10
  8. 1.525 km SW of La Quinta, California, United States09-27 18:42
  9. 1.526 km SW of La Quinta, California, United States09-23 08:03
  10. 1.225 km SW of La Quinta, California, United States09-27 03:30
  11. 1.225 km WSW of Oasis, California, United States09-28 03:22
  12. 1.238 km SW of La Quinta, California, United States09-23 04:38
  13. 1.225 km SW of La Quinta, California, United States09-28 16:43
  14. 0.941 km ENE of Valley Center, California, United States09-26 06:57
  15. 0.934 km ENE of Valley Center, California, United States09-27 13:13
  16. 0.925 km SW of La Quinta, California, United States09-24 15:09
  17. 0.828 km WSW of Oasis, California, United States09-23 05:21
  18. 0.825 km SW of La Quinta, California, United States09-23 06:12
  19. 0.826 km SW of Oasis, California, United States09-28 17:54
  20. 0.826 km WSW of Oasis, California, United States09-25 01:46
  21. 0.826 km SW of Oasis, California, United States09-24 06:08
  22. 0.725 km SW of La Quinta, California, United States09-24 01:15
  23. 0.729 km NE of San Diego Country Estates, California, United States09-23 04:32
  24. 0.726 km SW of Oasis, California, United States09-24 07:44
  25. 0.730 km WSW of Oasis, California, United States09-24 18:24

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Reports on SeismoAtlas

No reports yet.

Event id ci41336775. First recorded here 28 Sept 2026, 17:32:12 UTC. Solutions: USGS · CI (usgs:ci41336775). Cite as: SeismoAtlas, “M1.0 earthquake 31 km WSW of Oasis, California, United States”, https://seismoatlas.com/earthquake/ci41336775-m1-0-earthquake-31-km-wsw-of-oasis-california-united-states, data from USGS.

JSON: /api/v1/events/ci41336775. SeismoAtlas is not an official warning service.