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M2.2 earthquake 36 km E of San Diego Country Estates, California, United States

A magnitude 2.2 earthquake struck 36 km E of San Diego Country Estates, California, United States at 22:38 local time (05:38 UTC) on 26 Oct 2026, at a depth of 10 km, according to USGS.

revised from M2.3 · 1 reports to USGS “Did You Feel It?”

Data: USGS · updated 2026-10-27 15:31 UTC · reviewed

Magnitude
2.2micro
local magnitude (Richter) (ml)
revised from 2.3
Depth
9.9 km
Status
Reviewed
Origin time
2026-10-27 05:38:11 UTC
Local: 26 Oct 2026, 22:38:11 (America/Los Angeles)
Epicentre
33.042° N, 116.396° 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. 10,10936 kmINot felt
AlpineCalifornia, United States · pop. 14,23642 kmINot felt
RamonaCalifornia, United States · pop. 20,29244 kmINot felt
LakesideCalifornia, United States · pop. 20,64853 kmINot felt
Winter GardensCalifornia, United States · pop. 20,63155 kmINot felt
TecateBaja California, Mexico · pop. 64,76457 kmINot felt
Chula VistaCalifornia, United States · pop. 265,75778 kmINot felt
San DiegoCalifornia, United States · pop. 1,404,45280 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 Survey2.2 mlwas 2.39.9 km33.04° N, 116.40° 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 28 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 10 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.2 releases about 30× the energy of M1.2, and its waves are about 9.5× taller on a seismogram. Energy: 28 kg of TNT vs 951 g of TNT.

Each square is the energy of one M1.2. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

48 later earthquakes within 30 km; the largest was M2.4 8 days ago. 20 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.2

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
1.750.713
12.270.98
15.820.413
34.970.78
37.480.711
47.780.48
48.440.69
50.150.47
53.300.812
53.410.612
54.870.713
56.300.88
56.781.113
60.211.16
62.510.26
63.730.711
65.030.97
67.521.216
71.960.412
72.260.67
100.111.97
112.070.812
112.251.110
123.600.717
149.541.28
157.030.89
157.261.19
158.640.89
168.000.910
170.181.411
173.590.214
196.452.414
237.691.111
250.810.914
265.480.913
271.421.114
285.071.39
289.670.910
290.180.89
291.661.09
305.961.010
321.150.65
331.890.411
348.211.011
377.121.42
384.941.09
385.380.712
386.090.617
  1. 2.418 km E of Alpine, California, United States11-04 10:04
  2. 1.945 km E of San Diego Country Estates, California, United States10-31 09:44
  3. 1.429 km E of San Diego Country Estates, California, United States11-03 07:48
  4. 1.439 km WSW of Oasis, California, United States11-11 22:45
  5. 1.330 km E of San Diego Country Estates, California, United States11-08 02:42
  6. 1.232 km E of San Diego Country Estates, California, United States11-02 11:10
  7. 1.220 km ENE of Alpine, California, United States10-30 01:09
  8. 1.139 km ENE of San Diego Country Estates, California, United States10-31 21:52
  9. 1.139 km ENE of San Diego Country Estates, California, United States10-29 14:25
  10. 1.128 km SSW of Oasis, California, United States11-06 03:19
  11. 1.132 km E of San Diego Country Estates, California, United States11-07 13:03
  12. 1.146 km E of San Diego Country Estates, California, United States10-29 17:50
  13. 1.134 km E of San Diego Country Estates, California, United States11-02 18:54
  14. 1.017 km ENE of Alpine, California, United States11-12 06:34
  15. 1.030 km E of San Diego Country Estates, California, United States11-08 09:17
  16. 1.052 km NE of Tecate, Baja California, Mexico11-08 23:35
  17. 1.036 km ENE of San Diego Country Estates, California, United States11-10 17:50
  18. 0.934 km E of San Diego Country Estates, California, United States11-07 07:06
  19. 0.938 km SSW of Oasis, California, United States11-03 05:38
  20. 0.940 km SW of Oasis, California, United States11-06 16:26
  21. 0.926 km NNE of San Diego Country Estates, California, United States10-27 17:54
  22. 0.929 km ENE of San Diego Country Estates, California, United States10-29 22:40
  23. 0.920 km ENE of San Diego Country Estates, California, United States11-08 07:18
  24. 0.830 km E of San Diego Country Estates, California, United States11-08 07:49
  25. 0.834 km E of San Diego Country Estates, California, United States11-02 18:39

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.

USGS “Did You Feel It?” has 1 reports: add yours at USGS.

Event id ci41353399. First recorded here 27 Oct 2026, 05:40:39 UTC. Solutions: USGS · CI (usgs:ci41353399). Cite as: SeismoAtlas, “M2.2 earthquake 36 km E of San Diego Country Estates, California, United States”, https://seismoatlas.com/earthquake/ci41353399-m2-2-earthquake-36-km-e-of-san-diego-country-estates-california-united-states, data from USGS.

JSON: /api/v1/events/ci41353399. SeismoAtlas is not an official warning service.