Skip to content
SeismoAtlas

M1.5 earthquake 30 km WSW of Oasis, California, United States

A magnitude 1.5 earthquake struck 30 km WSW of Oasis, California, United States at 08:10 local time (15:10 UTC) on 23 Sept 2026, at a depth of 13 km, according to USGS.

Data: USGS · updated 2026-09-23 15:41 UTC · reviewed

Magnitude
1.5micro
local magnitude (Richter) (ml)
Depth
12.8 km
Status
Reviewed
Origin time
2026-09-23 15:10:45 UTC
Local: 23 Sept 2026, 08:10:45 (America/Los Angeles)
Epicentre
33.338° N, 116.387° 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. 6,89030 kmINot felt
La QuintaCalifornia, United States · pop. 40,47637 kmINot felt
Palm DesertCalifornia, United States · pop. 51,86942 kmINot felt
CoachellaCalifornia, United States · pop. 44,63543 kmINot felt
IndioCalifornia, United States · pop. 87,53345 kmINot felt
San DiegoCalifornia, United States · pop. 1,404,452100 kmINot felt
Chula VistaCalifornia, United States · pop. 265,757101 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 Survey1.5 ml12.8 km33.34° N, 116.39° W–Reviewed

Advertisement

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 13 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 5.8× the energy of M1.0, and its waves are about 3.2× 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

39 later earthquakes within 30 km; the largest was M2.3 1 day ago. 18 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
1.000.59
4.330.612
6.340.79
10.080.714
14.480.79
14.950.810
16.521.611
16.570.79
16.610.69
16.682.010
20.770.412
23.980.96
27.230.79
27.780.67
34.600.811
58.240.411
62.290.66
63.780.95
66.570.37
70.17-0.06
74.610.210
84.311.614
84.311.620
84.322.314
84.331.213
95.450.513
97.660.611
99.541.513
108.191.211
111.990.62
116.480.66
116.900.710
121.551.213
121.930.611
121.930.313
122.730.811
123.700.710
123.700.411
128.980.412
  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. 1.525 km SW of La Quinta, California, United States09-27 18:42
  7. 1.225 km SW of La Quinta, California, United States09-27 03:30
  8. 1.225 km WSW of Oasis, California, United States09-28 03:22
  9. 1.225 km SW of La Quinta, California, United States09-28 16:43
  10. 0.941 km ENE of Valley Center, California, United States09-26 06:57
  11. 0.925 km SW of La Quinta, California, United States09-24 15:09
  12. 0.826 km SW of Oasis, California, United States09-28 17:54
  13. 0.826 km WSW of Oasis, California, United States09-25 01:46
  14. 0.826 km SW of Oasis, California, United States09-24 06:08
  15. 0.725 km SW of La Quinta, California, United States09-24 01:15
  16. 0.726 km SW of Oasis, California, United States09-24 07:44
  17. 0.730 km WSW of Oasis, California, United States09-24 18:24
  18. 0.726 km SW of Oasis, California, United States09-24 05:39
  19. 0.730 km WSW of Oasis, California, United States09-28 12:04
  20. 0.725 km SW of Oasis, California, United States09-23 21:31
  21. 0.730 km SW of La Quinta, California, United States09-28 18:52
  22. 0.617 km SW of La Quinta, California, United States09-28 07:10
  23. 0.625 km SW of La Quinta, California, United States09-23 19:30
  24. 0.618 km SW of La Quinta, California, United States09-28 17:06
  25. 0.638 km ENE of San Diego Country Estates, California, United States09-27 16:50

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

How strong was the shaking where you were?

Anonymous. No account, no cookies. A short automatic check runs in your browser instead of a third-party captcha.

Reports on SeismoAtlas

No reports yet.

Event id ci41337703. First recorded here 28 Sept 2026, 17:32:11 UTC. Solutions: USGS · CI (usgs:ci41337703). Cite as: SeismoAtlas, “M1.5 earthquake 30 km WSW of Oasis, California, United States”, https://seismoatlas.com/earthquake/ci41337703-m1-5-earthquake-30-km-wsw-of-oasis-california-united-states, data from USGS.

JSON: /api/v1/events/ci41337703. SeismoAtlas is not an official warning service.