QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

Earthquake near Fajardo, PR

No earthquake was likely felt in Fajardo in the 24 hours to 9:59 pm AST (01:59 UTC). The last one was M 4.1, 53 km (33 mi) SE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Fajardo

This page: a magnitude 3.6 earthquake was recorded 41 km (26 mi) northeast of Fajardo, PR, at 11:39 pm AST on 13 May 2025 (03:39 UTC), 64 km deep. 1 person has reported feeling it to USGS.

USGS: 36 km NNW of Culebra, Puerto Rico

73 km (45 mi) ENE of San Juan, PR

11:39 pm AST, May 13, 2025 · · 64 km deep · released about 3.3 tons of TNT

Every earthquake near Fajardo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 32 kmCulebra Municipio 34 kmLuquillo Municipio 42 kmCeiba Municipio 46 kmRío Grande Municipio 49 kmVieques Municipio 55 kmNaguabo Municipio 57 kmLoíza Municipio 59 kmCanóvanas Municipio 59 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
11:39 pm AST on 13 May 2025 ()
Where
41 km (26 mi) northeast of Fajardo, PR · earthquakes near Fajardo
Magnitude
M 3.6 (md)
Depth
64 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Fajardo Municipio, 32 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 474 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 20 km (12 mi) from the epicentre. In Fajardo, 41 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 3.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 51,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,600× the energy of this one
  4. This earthquake M 3.6 about 3.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 6.9× more

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 4.8 on 2021-03-09 — about 72 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.0 73 km NNE of Vieques, Puerto Rico · 44 km NNW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 18.6173, -65.4106. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Fajardo Municipio, PR 32 km (20 mi) SW earthquakes near Fajardo Municipio
Culebra Municipio, PR 34 km (21 mi) SSE earthquakes near Culebra Municipio
Luquillo Municipio, PR 42 km (26 mi) SW earthquakes near Luquillo Municipio
Ceiba Municipio, PR 46 km (29 mi) SSW earthquakes near Ceiba Municipio
Río Grande Municipio, PR 49 km (30 mi) WSW earthquakes near Río Grande Municipio
Vieques Municipio, PR 55 km (34 mi) S earthquakes near Vieques Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

38 earthquakes have been recorded within 50 km since this one.

  1. 2.9 64 km NNE of Luquillo, Puerto Rico
  2. 3.3 39 km N of Culebra, Puerto Rico
  3. 3.0 48 km N of Culebra, Puerto Rico
  4. 3.0 34 km NNE of Suárez, Puerto Rico
  5. 3.1 63 km N of Culebra, Puerto Rico
  6. 3.1 63 km N of Culebra, Puerto Rico
  7. 3.1 44 km NNW of Charlotte Amalie, U.S. Virgin Islands
  8. 3.3 82 km N of Culebra, Puerto Rico
  9. 3.1 77 km NNE of Luquillo, Puerto Rico
  10. 3.3 77 km N of Culebra, Puerto Rico
  11. 3.4 32 km NNE of Luquillo, Puerto Rico
  12. 2.8 32 km NNE of Vieques, Puerto Rico
  13. 2.8 28 km NNE of Luquillo, Puerto Rico
  14. 4.0 58 km N of Culebra, Puerto Rico
  15. 3.3 44 km N of Charlotte Amalie, U.S. Virgin Islands

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.