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SeismoAtlas

M3.7 earthquake 77 km WNW of Pecos, Texas, United States

A magnitude 3.7 earthquake struck 77 km WNW of Pecos, Texas, United States at 16:27 local time (21:27 UTC) on 28 Oct 2026, at a depth of 6 km, according to USGS.

revised from M3.6

Data: USGS · updated 2026-10-28 21:51 UTC · reviewed

Magnitude
3.7minor
local magnitude (Richter) (ml)
revised from 3.6
Depth
6.1 km
Status
Reviewed
Origin time
2026-10-28 21:27:20 UTC
Local: 28 Oct 2026, 16:27:20 (America/Chicago)
Epicentre
31.693° N, 104.237° 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
PecosTexas, United States · pop. 9,51777 kmINot felt
CarlsbadNew Mexico, United States · pop. 28,95781 kmINot felt
Ciudad JuárezChihuahua, Mexico · pop. 1,512,450210 kmINot felt
El PasoTexas, United States · pop. 678,815213 kmINot felt
ChihuahuaMexico · pop. 925,762383 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. Likely felt out to about 32 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 · TX, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · TXheadlineTexNet via U.S. Geological Survey3.7 mlwas 3.66.1 km31.69° N, 104.24° W–Reviewed · 1 revision

How big was it?

Often felt by people at rest close to the epicentre, rarely causes damage.

It released roughly the energy of 5.4 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 6 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M3.7 releases about 32× the energy of M2.7, and its waves are about 10× taller on a seismogram. Energy: 5.4 t of TNT vs 169 kg of TNT.

Each square is the energy of one M2.7. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

89 later earthquakes within 30 km; the largest was M3.0 3 days ago. 42 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M3.7

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
4.222.19
33.842.18
34.171.97
34.531.97
35.021.86
59.371.57
59.672.26
60.911.97
61.061.77
62.771.76
62.821.76
65.721.77
65.721.98
65.771.67
67.001.87
70.202.48
80.542.14
81.741.68
82.681.96
84.751.96
90.212.77
90.711.78
97.621.97
99.761.77
101.271.66
103.901.56
104.932.06
106.791.57
108.101.58
109.441.67
110.852.17
113.241.87
115.432.35
115.852.47
116.691.77
116.711.67
126.881.87
127.712.06
129.451.87
131.572.07
132.251.73
136.652.06
141.241.67
143.411.88
152.932.06
156.391.96
159.381.87
161.361.72
176.402.27
182.891.97
192.771.82
192.981.97
205.712.55
209.131.96
210.422.16
220.732.17
241.151.96
245.241.75
254.722.17
258.942.16
259.661.86
259.781.76
260.112.36
263.531.68
263.842.28
272.131.77
274.622.16
274.731.96
276.001.86
279.942.06
282.013.06
283.792.17
290.591.88
291.311.58
292.161.76
295.842.37
301.501.67
301.532.26
302.331.58
305.431.59
319.452.46
319.502.07
321.072.05
321.121.66
325.782.06
329.442.46
329.442.57
352.331.96
357.851.78
  1. 3.087 km SSW of Carlsbad, New Mexico, United States11-09 15:27
  2. 2.783 km WNW of Pecos, Texas, United States11-01 15:40
  3. 2.588 km SSW of Carlsbad, New Mexico, United States11-06 11:09
  4. 2.584 km S of Carlsbad, New Mexico, United States11-11 14:53
  5. 2.451 km WNW of Pecos, Texas, United States10-31 19:39
  6. 2.485 km S of Carlsbad, New Mexico, United States11-02 17:18
  7. 2.478 km S of Carlsbad, New Mexico, United States11-11 04:54
  8. 2.484 km WNW of Pecos, Texas, United States11-11 14:53
  9. 2.387 km SSW of Carlsbad, New Mexico, United States11-02 16:53
  10. 2.371 km WNW of Pecos, Texas, United States11-08 17:33
  11. 2.361 km WNW of Pecos, Texas, United States11-10 05:17
  12. 2.291 km SSW of Carlsbad, New Mexico, United States10-31 09:07
  13. 2.263 km WNW of Pecos, Texas, United States11-05 05:51
  14. 2.269 km WNW of Pecos, Texas, United States11-08 21:17
  15. 2.286 km SSW of Carlsbad, New Mexico, United States11-10 10:59
  16. 2.191 km SSW of Carlsbad, New Mexico, United States10-29 01:40
  17. 2.177 km WNW of Pecos, Texas, United States10-30 07:18
  18. 2.185 km SSW of Carlsbad, New Mexico, United States11-01 05:59
  19. 2.189 km SSW of Carlsbad, New Mexico, United States11-02 12:18
  20. 2.186 km SSW of Carlsbad, New Mexico, United States11-06 15:52
  21. 2.182 km S of Carlsbad, New Mexico, United States11-07 02:11
  22. 2.179 km WNW of Pecos, Texas, United States11-08 12:10
  23. 2.171 km WNW of Pecos, Texas, United States11-08 16:23
  24. 2.171 km WNW of Pecos, Texas, United States11-09 08:04
  25. 2.151 km WNW of Pecos, Texas, United States11-09 17:14

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.

Event id us7000ttu5. First recorded here 28 Oct 2026, 21:42:20 UTC. Solutions: USGS · TX (usgs:tx2026vgingz). Cite as: SeismoAtlas, “M3.7 earthquake 77 km WNW of Pecos, Texas, United States”, https://seismoatlas.com/earthquake/us7000ttu5-m3-7-earthquake-77-km-wnw-of-pecos-texas-united-states, data from USGS.

JSON: /api/v1/events/us7000ttu5. SeismoAtlas is not an official warning service.