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M2.5 earthquake 45 km S of Oasis, California, United States

A magnitude 2.5 earthquake struck 45 km S of Oasis, California, United States at 19:41 local time (02:41 UTC) on 27 Oct 2026, at a depth of 7 km, according to USGS.

Data: USGS · updated 2026-10-28 18:16 UTC · reviewed

Magnitude
2.5micro
local magnitude (Richter) (ml)
Depth
7.3 km
Status
Reviewed
Origin time
2026-10-28 02:41:30 UTC
Local: 27 Oct 2026, 19:41:30 (America/Los Angeles)
Epicentre
33.071° N, 116.045° 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. 6,89045 kmINot felt
BrawleyCalifornia, United States · pop. 25,89749 kmINot felt
El CentroCalifornia, United States · pop. 43,95655 kmINot felt
Santa IsabelBaja California, Mexico · pop. 29,31166 kmINot felt
CalexicoCalifornia, United States · pop. 40,05367 kmINot felt
MexicaliBaja California, Mexico · pop. 1,032,68674 kmINot felt
Chula VistaCalifornia, United States · pop. 265,757108 kmINot felt
TijuanaBaja California, Mexico · pop. 1,922,523110 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. Likely felt out to about 7 km.

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 Survey2.5 mlwas 2.47.3 km33.07° N, 116.04° 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 101 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 7 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.5 releases about 38× the energy of M1.5, and its waves are about 11× taller on a seismogram. Energy: 101 kg of TNT vs 3 kg of TNT.

Each square is the energy of one M1.5. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

31 later earthquakes within 30 km; the largest was M1.9 12 days ago. 12 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.5

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.580.411
13.920.78
22.080.713
31.410.97
35.250.88
39.151.16
42.670.711
59.291.38
66.670.83
72.191.410
74.550.98
79.051.97
79.690.612
89.500.519
96.490.69
112.771.17
146.940.910
152.530.214
163.421.09
163.431.010
200.531.23
201.461.62
216.631.111
234.061.910
277.811.29
284.281.011
284.911.010
332.680.58
343.111.56
343.120.85
377.770.89
  1. 1.945 km E of San Diego Country Estates, California, United States10-31 09:44
  2. 1.937 km W of Imperial, California, United States11-06 20:45
  3. 1.637 km WNW of Brawley, California, United States11-05 12:09
  4. 1.526 km S of Oasis, California, United States11-11 09:47
  5. 1.427 km S of Oasis, California, United States10-31 02:53
  6. 1.336 km SSE of Oasis, California, United States10-30 13:58
  7. 1.237 km WNW of Brawley, California, United States11-05 11:13
  8. 1.223 km W of Brawley, California, United States11-08 16:30
  9. 1.130 km S of Oasis, California, United States11-01 19:27
  10. 1.128 km SSW of Oasis, California, United States11-06 03:19
  11. 1.146 km E of San Diego Country Estates, California, United States10-29 17:50
  12. 1.052 km ENE of Tecate, Baja California, Mexico11-08 22:58
  13. 1.052 km NE of Tecate, Baja California, Mexico11-08 23:35
  14. 1.028 km SSE of Oasis, California, United States11-03 22:06
  15. 1.027 km SSE of Oasis, California, United States11-03 22:07
  16. 0.945 km S of Oasis, California, United States10-29 10:05
  17. 0.944 km S of Oasis, California, United States10-31 05:14
  18. 0.938 km SSW of Oasis, California, United States11-03 05:38
  19. 0.825 km S of Oasis, California, United States11-11 09:48
  20. 0.819 km SSW of Oasis, California, United States10-30 21:21
  21. 0.847 km E of San Diego Country Estates, California, United States10-29 13:56
  22. 0.844 km S of Oasis, California, United States11-12 20:27
  23. 0.750 km E of Alpine, California, United States10-28 16:36
  24. 0.750 km S of Oasis, California, United States10-29 21:21
  25. 0.724 km S of Oasis, California, United States10-29 00:46

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 ci41567984. First recorded here 28 Oct 2026, 02:44:24 UTC. Solutions: USGS · CI (usgs:ci41567984). Cite as: SeismoAtlas, “M2.5 earthquake 45 km S of Oasis, California, United States”, https://seismoatlas.com/earthquake/ci41567984-m2-5-earthquake-45-km-s-of-oasis-california-united-states, data from USGS.

JSON: /api/v1/events/ci41567984. SeismoAtlas is not an official warning service.