M3.1 earthquake near Eleanor Roosevelt, San Juan, Puerto Rico
A magnitude 3.1 earthquake struck near Eleanor Roosevelt, San Juan, Puerto Rico at 11:42 local time (15:42 UTC) on 6 Oct 2026, at a depth of 113 km, according to USGS.
Data: USGS · updated 2026-10-06 16:53 UTC · reviewed
- Magnitude
- 3.1minor
duration magnitude (md) - Depth
- 113 km
- Status
- Reviewed
- Origin time
- 2026-10-06 15:42:06 UTC
- Local: 6 Oct 2026, 11:42:06 (America/Puerto Rico)
- Epicentre
- 18.409° N, 66.045° 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 |
|---|---|---|
| Eleanor RooseveltSan Juan, Puerto Rico · pop. 5,075 | 2 km | INot felt |
| Trujillo AltoPuerto Rico · pop. 75,243 | 7 km | INot felt |
| CatañoPuerto Rico · pop. 28,093 | 9 km | INot felt |
| GuaynaboPuerto Rico · pop. 81,360 | 9 km | INot felt |
| CarolinaPuerto Rico · pop. 170,404 | 9 km | INot felt |
| San JuanPuerto Rico · pop. 418,140 | 10 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.
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.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · PRheadlinePuerto Rico Seismic Network via U.S. Geological Survey | 3.1 md | 113 km | 18.41° N, 66.04° W | – | Reviewed |
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How big was it?
Often felt by people at rest close to the epicentre, rarely causes damage.
It released roughly the energy of 607 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 113 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.
M3.1 releases about 29× the energy of M2.1, and its waves are about 9.3× taller on a seismogram. Energy: 607 kg of TNT vs 21 kg of TNT.
Each square is the energy of one M2.1. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
No later earthquakes have been recorded within 30 km so far. Aftershock rates usually fall off roughly in proportion to 1/time.
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Reports on SeismoAtlas
No reports yet.
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Event id pr71535908. First recorded here 6 Oct 2026, 16:54:31 UTC. Solutions: USGS · PR (usgs:pr71535908). Cite as: SeismoAtlas, “M3.1 earthquake near Eleanor Roosevelt, San Juan, Puerto Rico”, https://seismoatlas.com/earthquake/pr71535908-m3-1-earthquake-near-eleanor-roosevelt-san-juan-puerto-rico, data from USGS.
JSON: /api/v1/events/pr71535908. SeismoAtlas is not an official warning service.