M4.0 earthquake 86 km SSW of Carlsbad, New Mexico, United States
A magnitude 4.0 earthquake struck 86 km SSW of Carlsbad, New Mexico, United States at 02:04 local time (08:04 UTC) on 11 Oct 2026, at a depth of 6 km, according to USGS.
revised from M3.8 · 2 reports to USGS “Did You Feel It?”
Data: USGS · updated 2026-10-11 08:28 UTC · reviewed
- Magnitude
- 4.0light
local magnitude (Richter) (ml)
revised from 3.8 - Depth
- 5.9 km
- Status
- Reviewed
- Origin time
- 2026-10-11 08:04:54 UTC
- Local: 11 Oct 2026, 02:04:54 (America/Denver)
- Epicentre
- 31.666° N, 104.427° W
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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
| Place | Distance | Est. shaking |
|---|---|---|
| CarlsbadNew Mexico, United States · pop. 28,957 | 86 km | IIWeak |
| PecosTexas, United States · pop. 9,517 | 93 km | INot felt |
| Ciudad JuárezChihuahua, Mexico · pop. 1,512,450 | 192 km | INot felt |
| El PasoTexas, United States · pop. 678,815 | 195 km | INot felt |
| ChihuahuaMexico · pop. 925,762 | 373 km | INot 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 43 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.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · TXheadlineTexNet via U.S. Geological Survey | 4.0 mlwas 3.8 | 5.9 km | 31.67° N, 104.43° W | – | Reviewed · 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 15 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.
M4.0 releases about 32× the energy of M3.0, and its waves are about 10× taller on a seismogram. Energy: 15 t of TNT vs 477 kg of TNT.
Each square is the energy of one M3.0. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
1 later earthquake within 30 km; the largest was M2.6 54 min ago. 33 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M4.0
1 later earthquake nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 0.37 | 2.6 | 9 |
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
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Event id us6000u1jb. First recorded here 11 Oct 2026, 08:15:33 UTC. Solutions: USGS · TX (usgs:tx2026uacobs). Cite as: SeismoAtlas, “M4.0 earthquake 86 km SSW of Carlsbad, New Mexico, United States”, https://seismoatlas.com/earthquake/us6000u1jb-m4-0-earthquake-86-km-ssw-of-carlsbad-new-mexico-united-states, data from USGS.
JSON: /api/v1/events/us6000u1jb. SeismoAtlas is not an official warning service.