QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

Earthquake near Central Aguirre, PR

No earthquake was likely felt in Central Aguirre in the 24 hours to 10:14 am AST (14:14 UTC). The last one was M 3.0, 23 km (14 mi) WSW, at 7:09 pm AST on 5 November 2026, estimated intensity II (weak) in town. Every earthquake near Central Aguirre

This page: a magnitude 1.5 earthquake was recorded 7 km (4 mi) south of Central Aguirre, PR, at 8:42 am AST on 4 April 2026 (12:42 UTC), 13 km deep.

USGS: 6 km S of Central Aguirre, Puerto Rico

59 km (37 mi) SSW of San Juan, PR · 42 km (26 mi) SSW of Caguas, PR

8:42 am AST, Apr 4, 2026 · · 13 km deep · released about 5.6 lb of TNT

Every earthquake near Central Aguirre Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salinas Municipio 10 kmGuayama Municipio 13 kmSanta Isabel Municipio 19 kmArroyo Municipio 21 kmCayey Municipio 25 kmAibonito Municipio 27 kmCoamo Municipio 28 kmPatillas Municipio 28 kmJuana Díaz Municipio 31 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
8:42 am AST on 4 April 2026 ()
Where
7 km (4 mi) south of Central Aguirre, PR · earthquakes near Central Aguirre
Magnitude
M 1.5 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 10 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 221 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Central Aguirre, 7 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.

Earthquakes near other towns within 30 km: Coquí, Jobos, Salinas, Coco, Las Ochenta, Guayama.

How big was it?

This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 lb of TNT

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 5.0 on 2020-01-07 — about 170,000 times the energy of this one.

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

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 42 km NNE 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 17.8925, -66.2213. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Salinas Municipio, PR 10 km (6 mi) NNW earthquakes near Salinas Municipio
Guayama Municipio, PR 13 km (8 mi) NE earthquakes near Guayama Municipio
Santa Isabel Municipio, PR 19 km (12 mi) WNW earthquakes near Santa Isabel Municipio
Arroyo Municipio, PR 21 km (13 mi) ENE earthquakes near Arroyo Municipio
Cayey Municipio, PR 25 km (15 mi) NNE earthquakes near Cayey Municipio
Aibonito Municipio, PR 27 km (17 mi) N earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.2 5 km ENE of Comerío, Puerto Rico
  2. 2.2 3 km SSW of Salinas, Puerto Rico
  3. 2.0 8 km S of Salinas, Puerto Rico
  4. 1.9 1 km E of Salinas, Puerto Rico
  5. 2.1 4 km E of Tallaboa, Puerto Rico
  6. 2.6 4 km W of Ponce, Puerto Rico
  7. 2.2 3 km W of Vázquez, Puerto Rico
  8. 1.9 6 km S of Salinas, Puerto Rico
  9. 2.1 6 km S of Salinas, Puerto Rico
  10. 1.9 11 km S of Emajagua, Puerto Rico
  11. 2.0 5 km SSE of Salinas, Puerto Rico
  12. 2.4 7 km S of Salinas, Puerto Rico
  13. 2.4 4 km NNE of Ponce, Puerto Rico
  14. 2.1 7 km WSW of Naranjito, Puerto Rico
  15. 2.7 21 km SSE of Emajagua, 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.