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M0.9 earthquake 44 km S of Oasis, California, United States

A magnitude 0.9 earthquake struck 44 km S of Oasis, California, United States at 22:14 local time (05:14 UTC) on 30 Oct 2026, at a depth of 8 km, according to USGS.

revised from M1.0

Data: USGS · updated 2026-11-02 15:56 UTC · reviewed

Magnitude
0.9micro
local magnitude (Richter) (ml)
revised from 1.0
Depth
7.7 km
Status
Reviewed
Origin time
2026-10-31 05:14:14 UTC
Local: 30 Oct 2026, 22:14:14 (America/Los Angeles)
Epicentre
33.080° N, 116.031° 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. 6,89044 kmINot felt
BrawleyCalifornia, United States · pop. 25,89748 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. 265,757110 kmINot felt
TijuanaBaja California, Mexico · pop. 1,922,523111 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 Survey0.9 mlwas 1.07.7 km33.08° N, 116.03° 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 362 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 8 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 1.3× the energy of M0.9, and its waves are about 1.2× taller on a seismogram. Energy: 477 g of TNT vs 362 g of TNT.

Each square is the energy of one M0.9. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

18 later earthquakes within 30 km; the largest was M1.9 12 days ago. 20 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M0.9

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
4.501.97
5.140.612
14.960.519
21.940.69
38.221.17
72.400.910
88.871.09
88.881.010
125.981.23
126.921.62
142.091.111
159.521.910
203.271.29
210.361.010
258.140.58
268.561.56
268.570.85
303.220.89
  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. 1.237 km WNW of Brawley, California, United States11-05 11:13
  6. 1.223 km W of Brawley, California, United States11-08 16:30
  7. 1.130 km S of Oasis, California, United States11-01 19:27
  8. 1.128 km SSW of Oasis, California, United States11-06 03:19
  9. 1.052 km NE of Tecate, Baja California, Mexico11-08 23:35
  10. 1.028 km SSE of Oasis, California, United States11-03 22:06
  11. 1.027 km SSE of Oasis, California, United States11-03 22:07
  12. 0.938 km SSW of Oasis, California, United States11-03 05:38
  13. 0.825 km S of Oasis, California, United States11-11 09:48
  14. 0.844 km S of Oasis, California, United States11-12 20:27
  15. 0.643 km W of Imperial, California, United States10-31 10:22
  16. 0.632 km SSE of Oasis, California, United States11-01 03:10
  17. 0.522 km WNW of Imperial, California, United States11-10 23:22
  18. 0.545 km W of Brawley, California, United States10-31 20:11

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Reports on SeismoAtlas

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Event id ci41570168. First recorded here 31 Oct 2026, 05:17:41 UTC. Solutions: USGS · CI (usgs:ci41570168). Cite as: SeismoAtlas, “M0.9 earthquake 44 km S of Oasis, California, United States”, https://seismoatlas.com/earthquake/ci41570168-m0-9-earthquake-44-km-s-of-oasis-california-united-states, data from USGS.

JSON: /api/v1/events/ci41570168. SeismoAtlas is not an official warning service.