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M0.8 earthquake 26 km ENE of San Diego Country Estates, California, United States

A magnitude 0.8 earthquake struck 26 km ENE of San Diego Country Estates, California, United States at 14:42 local time (21:42 UTC) on 31 Oct 2026, at a depth of 12 km, according to USGS.

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

Magnitude
0.8micro
local magnitude (Richter) (ml)
Depth
12.4 km
Status
Reviewed
Origin time
2026-10-31 21:42:30 UTC
Local: 31 Oct 2026, 14:42:30 (America/Los Angeles)
Epicentre
33.106° N, 116.520° 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. 10,10926 kmINot felt
RamonaCalifornia, United States · pop. 20,29233 kmINot felt
LakesideCalifornia, United States · pop. 20,64846 kmINot felt
Winter GardensCalifornia, United States · pop. 20,63149 kmINot felt
PowayCalifornia, United States · pop. 50,15751 kmINot felt
San DiegoCalifornia, United States · pop. 1,404,45274 kmINot felt
Chula VistaCalifornia, United States · pop. 265,75774 kmINot felt
TijuanaBaja California, Mexico · pop. 1,922,52381 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 Survey0.8 ml12.4 km33.11° N, 116.52° W–Reviewed · 1 revision

How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 231 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 12 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 2.1× the energy of M0.8, and its waves are about 1.6× taller on a seismogram. Energy: 477 g of TNT vs 231 g of TNT.

Each square is the energy of one M0.8. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

35 later earthquakes within 30 km; the largest was M2.4 8 days ago. 30 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M0.8

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.171.110
11.520.717
37.471.28
44.950.89
45.191.19
46.570.89
55.930.910
58.111.411
61.510.214
72.190.713
84.372.414
85.080.89
102.260.613
133.050.411
138.740.914
153.410.913
159.341.114
173.001.39
177.600.910
178.110.89
179.591.09
209.080.65
214.230.813
219.820.411
223.011.212
236.141.011
237.600.411
239.681.317
245.550.710
265.051.42
265.680.910
272.670.412
272.871.09
273.310.712
274.020.617
  1. 2.418 km E of Alpine, California, United States11-04 10:04
  2. 1.429 km E of San Diego Country Estates, California, United States11-03 07:48
  3. 1.439 km WSW of Oasis, California, United States11-11 22:45
  4. 1.316 km NNE of Ramona, California, United States11-10 21:23
  5. 1.330 km E of San Diego Country Estates, California, United States11-08 02:42
  6. 1.229 km SW of Oasis, California, United States11-10 04:42
  7. 1.232 km E of San Diego Country Estates, California, United States11-02 11:10
  8. 1.139 km ENE of San Diego Country Estates, California, United States10-31 21:52
  9. 1.132 km E of San Diego Country Estates, California, United States11-07 13:03
  10. 1.134 km E of San Diego Country Estates, California, United States11-02 18:54
  11. 1.017 km ENE of Alpine, California, United States11-12 06:34
  12. 1.030 km E of San Diego Country Estates, California, United States11-08 09:17
  13. 1.036 km ENE of San Diego Country Estates, California, United States11-10 17:50
  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. 0.835 km ENE of Valley Center, California, United States11-09 19:56
  24. 0.723 km NNE of Ramona, California, United States11-11 03:15
  25. 0.726 km ENE of San Diego Country Estates, California, United States11-12 07:01

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Reports on SeismoAtlas

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Event id ci41570536. First recorded here 31 Oct 2026, 21:46:23 UTC. Solutions: USGS · CI (usgs:ci41570536). Cite as: SeismoAtlas, “M0.8 earthquake 26 km ENE of San Diego Country Estates, California, United States”, https://seismoatlas.com/earthquake/ci41570536-m0-8-earthquake-26-km-ene-of-san-diego-country-estates-california-united-states, data from USGS.

JSON: /api/v1/events/ci41570536. SeismoAtlas is not an official warning service.