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M1.1 earthquake 39 km ENE of San Diego Country Estates, California, United States

A magnitude 1.1 earthquake struck 39 km ENE of San Diego Country Estates, California, United States at 14:52 local time (21:52 UTC) on 31 Oct 2026, at a depth of 10 km, according to USGS.

revised from M1.2

Data: USGS · updated 2026-11-02 15:25 UTC · reviewed

Magnitude
1.1micro
local magnitude (Richter) (ml)
revised from 1.2
Depth
10.4 km
Status
Reviewed
Origin time
2026-10-31 21:52:57 UTC
Local: 31 Oct 2026, 14:52:57 (America/Los Angeles)
Epicentre
33.171° N, 116.407° 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
San Diego Country EstatesCalifornia, United States · pop. 10,10939 kmINot felt
OasisCalifornia, United States · pop. 6,89044 kmINot felt
RamonaCalifornia, United States · pop. 20,29246 kmINot felt
La QuintaCalifornia, United States · pop. 40,47655 kmINot felt
LakesideCalifornia, United States · pop. 20,64859 kmINot felt
CoachellaCalifornia, United States · pop. 44,63561 kmINot felt
Chula VistaCalifornia, United States · pop. 265,75786 kmINot felt
San DiegoCalifornia, United States · pop. 1,404,45286 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 Survey1.1 mlwas 1.210.4 km33.17° N, 116.41° 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 773 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 10 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.1 releases about 1.6× the energy of M1.0, and its waves are about 1.4× taller on a seismogram. Energy: 773 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

38 later earthquakes within 30 km; the largest was M1.4 9 days ago. 38 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.1

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
11.350.717
26.501.112
37.301.28
44.780.89
45.021.19
46.400.89
55.750.910
57.931.411
58.940.515
61.340.214
72.010.713
84.910.89
96.560.713
112.911.310
118.410.512
125.441.111
138.560.914
150.760.710
153.230.913
159.171.114
172.821.39
177.430.910
177.940.89
179.421.09
200.080.711
208.900.65
211.370.914
219.650.411
222.831.212
235.961.011
237.430.18
237.430.411
245.460.212
264.881.42
265.510.910
272.490.412
273.140.712
273.850.617
  1. 1.429 km E of San Diego Country Estates, California, United States11-03 07:48
  2. 1.439 km WSW of Oasis, California, United States11-11 22:45
  3. 1.318 km SW of Oasis, California, United States11-05 14:47
  4. 1.330 km E of San Diego Country Estates, California, United States11-08 02:42
  5. 1.229 km SW of Oasis, California, United States11-10 04:42
  6. 1.232 km E of San Diego Country Estates, California, United States11-02 11:10
  7. 1.128 km SSW of Oasis, California, United States11-06 03:19
  8. 1.132 km E of San Diego Country Estates, California, United States11-07 13:03
  9. 1.129 km SSW of La Quinta, California, United States11-02 00:22
  10. 1.134 km E of San Diego Country Estates, California, United States11-02 18:54
  11. 1.030 km E of San Diego Country Estates, California, United States11-08 09:17
  12. 1.036 km ENE of San Diego Country Estates, California, United States11-10 17:50
  13. 0.930 km WSW of Oasis, California, United States11-09 17:15
  14. 0.934 km E of San Diego Country Estates, California, United States11-07 07:06
  15. 0.938 km SSW of Oasis, California, United States11-03 05:38
  16. 0.940 km SW of Oasis, California, United States11-06 16:26
  17. 0.930 km SW of Oasis, California, United States11-11 23:23
  18. 0.920 km ENE of San Diego Country Estates, California, United States11-08 07:18
  19. 0.830 km E of San Diego Country Estates, California, United States11-08 07:49
  20. 0.823 km NNE of San Diego Country Estates, California, United States11-04 10:47
  21. 0.834 km E of San Diego Country Estates, California, United States11-02 18:39
  22. 0.835 km E of San Diego Country Estates, California, United States11-02 20:16
  23. 0.719 km SW of Oasis, California, United States11-07 04:38
  24. 0.726 km ENE of San Diego Country Estates, California, United States11-12 07:01
  25. 0.729 km WSW of Oasis, California, United States11-03 21:53

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Event id ci41570544. First recorded here 31 Oct 2026, 21:56:24 UTC. Solutions: USGS · CI (usgs:ci41570544). Cite as: SeismoAtlas, “M1.1 earthquake 39 km ENE of San Diego Country Estates, California, United States”, https://seismoatlas.com/earthquake/ci41570544-m1-1-earthquake-39-km-ene-of-san-diego-country-estates-california-united-states, data from USGS.

JSON: /api/v1/events/ci41570544. SeismoAtlas is not an official warning service.