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SeismoAtlas

M4.9 earthquake 9 km NNE of Delta, Baja California, Mexico

A magnitude 4.9 earthquake struck 9 km NNE of Delta, Baja California, Mexico at 10:27 local time (18:27 UTC) on 3 Nov 2026, at a depth of 16 km, according to USGS and GFZ.

Reported by 2 agencies · revised from M5.0 · 283 reports to USGS “Did You Feel It?”

Data: USGS, GFZ · updated 2026-11-03 19:49 UTC · reviewed

Magnitude
4.9light
moment magnitude (mw)
revised from 5.0
Depth
15.6 km
Status
Reviewed
Origin time
2026-11-03 18:27:31 UTC
Local: 3 Nov 2026, 10:27:31 (America/Tijuana)
Epicentre
32.431° N, 115.180° W

Circles show this event and others within 35 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
DeltaBaja California, Mexico · pop. 5,1809 kmVModerate
Ciudad Guadalupe VictoriaBaja California, Mexico · pop. 17,11917 kmVModerate
MexicaliBaja California, Mexico · pop. 1,032,68634 kmIVLight
San LuisArizona, United States · pop. 31,52038 kmIVLight
San Luis Río ColoradoSonora, Mexico · pop. 176,68539 kmIVLight
CalexicoCalifornia, United States · pop. 40,05341 kmIVLight
EnsenadaBaja California, Mexico · pop. 443,807148 kmIIWeak
TijuanaBaja California, Mexico · pop. 1,922,523171 kmIIWeak

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 112 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 Survey4.9 mwwas 4.615.6 km32.43° N, 115.18° W–Reviewed · 4 revisions
GFZGFZ via GEOFON, GFZ Helmholtz Centre for Geosciences5.0 mbwas 4.910 km32.61° N, 115.13° W+4.8 sAutomatic · 1 revision

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How big was it?

Widely felt near the epicentre: rattling windows and objects. Significant damage is unlikely.

It released roughly the energy of 323 t 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 16 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M4.9 releases about 30× the energy of M3.9, and its waves are about 9.7× taller on a seismogram. Energy: 323 t of TNT vs 11 t of TNT.

Each square is the energy of one M3.9. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

18 later earthquakes within 35 km; the largest was M3.0 9 days ago. 20 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M4.9

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
0.252.216
0.252.212
0.331.813
0.843.016
0.901.919
1.132.116
1.142.515
1.361.315
1.372.012
1.822.214
1.842.012
3.402.115
4.122.120
6.391.611
7.741.813
52.212.311
186.931.820
187.522.019
  1. 3.08 km NNE of Delta, Baja California, Mexico11-03 19:18
  2. 2.58 km NNE of Delta, Baja California, Mexico11-03 19:35
  3. 2.311 km W of Doctor Alberto Oviedo Mota, Baja California, Mexico11-05 22:39
  4. 2.29 km NNE of Delta, Baja California, Mexico11-03 18:42
  5. 2.28 km NE of Delta, Baja California, Mexico11-03 18:42
  6. 2.210 km NNE of Delta, Baja California, Mexico11-03 20:16
  7. 2.110 km NNE of Delta, Baja California, Mexico11-03 22:34
  8. 2.17 km NNE of Delta, Baja California, Mexico11-03 19:35
  9. 2.17 km N of Delta, Baja California, Mexico11-03 21:51
  10. 2.011 km E of Puebla, Baja California, Mexico11-11 13:58
  11. 2.09 km NNE of Delta, Baja California, Mexico11-03 19:49
  12. 2.010 km NNE of Delta, Baja California, Mexico11-03 20:17
  13. 1.910 km NNE of Delta, Baja California, Mexico11-03 19:21
  14. 1.89 km NE of Delta, Baja California, Mexico11-03 18:47
  15. 1.811 km E of Puebla, Baja California, Mexico11-11 13:23
  16. 1.811 km NNE of Delta, Baja California, Mexico11-04 02:12
  17. 1.69 km NNE of Delta, Baja California, Mexico11-04 00:50
  18. 1.36 km N of Delta, Baja California, Mexico11-03 19:49

Did you feel it?

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Reports on SeismoAtlas

No reports yet.

USGS “Did You Feel It?” has 283 reports: add yours at USGS.

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Event id ew1793730460. First recorded here 3 Nov 2026, 18:29:21 UTC. Solutions: USGS · CI (usgs:ci41572064); GFZ (geofon:gfz2026vomm). Cite as: SeismoAtlas, “M4.9 earthquake 9 km NNE of Delta, Baja California, Mexico”, https://seismoatlas.com/earthquake/ew1793730460-m4-9-earthquake-9-km-nne-of-delta-baja-california-mexico, data from USGS, GFZ.

JSON: /api/v1/events/ew1793730460. SeismoAtlas is not an official warning service.