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M2.2 earthquake 5 km W of Guánica, Puerto Rico

A magnitude 2.2 earthquake struck 5 km W of Guánica, Puerto Rico at 04:19 local time (08:19 UTC) on 1 Oct 2026, at a depth of 16 km, according to USGS.

Data: USGS · updated 2026-10-01 08:33 UTC · reviewed

Magnitude
2.2micro
duration magnitude (md)
Depth
15.9 km
Status
Reviewed
Origin time
2026-10-01 08:19:14 UTC
Local: 1 Oct 2026, 04:19:14 (America/Puerto Rico)
Epicentre
17.966° N, 66.958° 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

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
GuánicaPuerto Rico · pop. 9,2245 kmINot felt
Sabana GrandePuerto Rico · pop. 8,96113 kmINot felt
YaucoPuerto Rico · pop. 20,29513 kmINot felt
MayagüezPuerto Rico · pop. 73,07732 kmINot felt
PoncePuerto Rico · pop. 137,49136 kmINot felt
AreciboPuerto Rico · pop. 87,75461 kmINot felt
San JuanPuerto Rico · pop. 418,140106 kmINot felt
Santo Domingo EsteSanto Domingo Province, Dominican Republic · pop. 700,000311 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 · PR, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · PRheadlinePuerto Rico Seismic Network via U.S. Geological Survey2.2 md15.9 km17.97° N, 66.96° W–Reviewed

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How big was it?

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

It released roughly the energy of 30 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 16 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 32× the energy of M1.2, and its waves are about 10× taller on a seismogram. Energy: 30 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

29 later earthquakes within 30 km; the largest was M2.8 1 day ago. 24 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.2

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
13.152.16
31.792.38
32.222.216
40.562.17
40.561.47
52.591.97
55.432.016
65.512.15
66.932.58
68.471.916
69.032.28
71.822.29
78.302.114
92.012.114
93.972.14
105.601.312
107.031.88
143.962.56
159.742.116
185.201.914
187.192.215
193.112.314
193.312.37
208.031.98
210.712.818
236.701.47
239.861.55
244.012.09
255.641.913
  1. 2.8Near Las Marías, Puerto Rico10-10 03:01
  2. 2.55 km WSW of Guánica, Puerto Rico10-04 03:14
  3. 2.5Near Guánica, Puerto Rico10-07 08:16
  4. 2.34 km SW of Guánica, Puerto Rico10-09 09:37
  5. 2.311 km SW of Lajas, Puerto Rico10-09 09:25
  6. 2.35 km WSW of Guánica, Puerto Rico10-02 16:06
  7. 2.25 km SW of Guánica, Puerto Rico10-04 05:20
  8. 2.28 km SSE of Guánica, Puerto Rico10-09 03:30
  9. 2.24 km SSW of Guánica, Puerto Rico10-04 08:08
  10. 2.2Near Guánica, Puerto Rico10-02 16:32
  11. 2.1Near Guayanilla, Puerto Rico10-04 14:36
  12. 2.112 km WSW of Guánica, Puerto Rico10-05 06:17
  13. 2.124 km S of Guánica, Puerto Rico10-01 21:27
  14. 2.16 km SW of Guánica, Puerto Rico10-03 00:52
  15. 2.1Near Guánica, Puerto Rico10-05 04:20
  16. 2.15 km WNW of Guánica, Puerto Rico10-04 01:49
  17. 2.15 km WNW of Yauco, Puerto Rico10-08 00:03
  18. 2.08 km ESE of Guánica, Puerto Rico10-03 15:45
  19. 2.0Near Guánica, Puerto Rico10-11 12:20
  20. 1.99 km SE of Lajas, Puerto Rico10-03 12:54
  21. 1.98 km ESE of Guánica, Puerto Rico10-04 04:47
  22. 1.99 km SW of Guánica, Puerto Rico10-09 01:31
  23. 1.9Near Guánica, Puerto Rico10-10 00:20
  24. 1.99 km W of Guánica, Puerto Rico10-11 23:57
  25. 1.86 km SE of Sabana Grande, Puerto Rico10-05 19:21

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Event id pr71535273. First recorded here 1 Oct 2026, 08:35:33 UTC. Solutions: USGS · PR (usgs:pr71535273). Cite as: SeismoAtlas, “M2.2 earthquake 5 km W of Guánica, Puerto Rico”, https://seismoatlas.com/earthquake/pr71535273-m2-2-earthquake-5-km-w-of-guanica-puerto-rico, data from USGS.

JSON: /api/v1/events/pr71535273. SeismoAtlas is not an official warning service.