QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

Earthquake near Luquillo, PR

No earthquake was likely felt in Luquillo in the 24 hours to 9:34 am AST (13:34 UTC). The last one was M 4.1, 61 km (38 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 Luquillo

This page: a magnitude 3.2 earthquake was recorded 25 km (15 mi) northeast of Luquillo, PR, at 4:55 am AST on 20 July 2025 (08:55 UTC), 34 km deep.

USGS: 24 km NE of Luquillo, Puerto Rico

54 km (34 mi) ENE of San Juan, PR · 45 km (28 mi) ENE of Carolina, PR

4:55 am AST, Jul 20, 2025 · · 34 km deep · released about 1,800 lb of TNT

Every earthquake near Luquillo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 18 kmLuquillo Municipio 25 kmRío Grande Municipio 31 kmCeiba Municipio 33 kmCulebra Municipio 37 kmLoíza Municipio 41 kmCanóvanas Municipio 41 kmNaguabo Municipio 41 kmCarolina Municipio 45 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
4:55 am AST on 20 July 2025 ()
Where
25 km (15 mi) northeast of Luquillo, PR · earthquakes near Luquillo
Magnitude
M 3.2 (md)
Depth
34 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 18 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 404 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 30 km (19 mi) from the epicentre. In Luquillo, 25 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.

Likely felt in: Luquillo 25 km, intensity II · Fajardo 26 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 190,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,000× the energy of this one
  4. This earthquake M 3.2 about 1,800 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.9× 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 270 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 18.5500, -65.5737. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Fajardo Municipio, PR 18 km (11 mi) S earthquakes near Fajardo Municipio
Luquillo Municipio, PR 25 km (15 mi) SW earthquakes near Luquillo Municipio
Río Grande Municipio, PR 31 km (19 mi) SW earthquakes near Río Grande Municipio
Ceiba Municipio, PR 33 km (21 mi) S earthquakes near Ceiba Municipio
Culebra Municipio, PR 37 km (23 mi) SE earthquakes near Culebra Municipio
Loíza Municipio, PR 41 km (25 mi) WSW earthquakes near Loíza Municipio

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

Aftershocks so far

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

  1. 3.4 49 km N of Suárez, Puerto Rico
  2. 3.1 21 km NE of Culebra, Puerto Rico
  3. 3.8 30 km NNE of Luquillo, Puerto Rico
  4. 2.9 59 km N of Culebra, Puerto Rico
  5. 2.3 5 km W of Campo Rico, Puerto Rico
  6. 2.8 8 km NE of Vieques, Puerto Rico
  7. 3.0 47 km NNE of Vieques, Puerto Rico
  8. 3.1 9 km SSE of Daguao, Puerto Rico
  9. 2.6 2 km SW of Campo Rico, Puerto Rico
  10. 3.1 39 km N of Loíza, Puerto Rico
  11. 2.9 64 km NNE of Luquillo, Puerto Rico
  12. 3.3 39 km N of Culebra, Puerto Rico
  13. 2.9 6 km NNW of Loíza, Puerto Rico
  14. 3.0 48 km N of Culebra, Puerto Rico
  15. 3.0 34 km NNE of Suárez, Puerto Rico

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.