QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Earthquake near Aguas Buenas, PR

No earthquake was likely felt in Aguas Buenas in the 24 hours to 9:47 pm AST (01:47 UTC). The last one was M 4.1, 87 km (54 mi) ESE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Aguas Buenas

This page: a magnitude 2.1 earthquake was recorded in Aguas Buenas, PR, at 12:38 pm AST on 9 April 2026 (16:38 UTC), 16 km deep.

USGS: 1 km SE of Aguas Buenas, Puerto Rico

6 km (4 mi) WNW of Caguas, PR

12:38 pm AST, Apr 9, 2026 · · 16 km deep · released about 49 lb of TNT

Every earthquake near Aguas Buenas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguas Buenas Municipio 4 kmCaguas Municipio 6 kmGuaynabo Municipio 11 kmCidra Municipio 11 kmGurabo Municipio 12 kmComerío Municipio 13 kmBayamón Municipio 14 kmTrujillo Alto Municipio 14 kmSan Lorenzo Municipio 17 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
12:38 pm AST on 9 April 2026 ()
Where
in Aguas Buenas, PR · earthquakes near Aguas Buenas
Magnitude
M 2.1 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Aguas Buenas Municipio, 4 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 216 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 7 km (4 mi) from the epicentre. 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: Sumidero 5 km, intensity II · Caguas 5 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 49 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 310,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 220,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 49 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 4.6 on 2016-12-05 — about 4,900 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 4 km WNW of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 38 km NW 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 18.2498, -66.0953. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguas Buenas Municipio, PR 4 km (2 mi) WNW earthquakes near Aguas Buenas Municipio
Caguas Municipio, PR 6 km (4 mi) SE earthquakes near Caguas Municipio
Guaynabo Municipio, PR 11 km (7 mi) N earthquakes near Guaynabo Municipio
Cidra Municipio, PR 11 km (7 mi) SW earthquakes near Cidra Municipio
Gurabo Municipio, PR 12 km (8 mi) ENE earthquakes near Gurabo Municipio
Comerío Municipio, PR 13 km (8 mi) WSW earthquakes near Comerío Municipio

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

Aftershocks so far

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

  1. 2.8 15 km NNE of Dorado, Puerto Rico
  2. 3.1 0 km WNW of Monserrate, Puerto Rico
  3. 3.2 2 km NE of Parcelas Nuevas, Puerto Rico
  4. 2.7 2 km WSW of Bayamón, Puerto Rico
  5. 1.9 4 km NW of Orocovis, Puerto Rico
  6. 2.4 3 km E of G. L. Garcia, Puerto Rico
  7. 2.1 5 km S of Salinas, Puerto Rico
  8. 2.8 5 km S of Salinas, Puerto Rico
  9. 2.1 7 km SSW of Jagual, Puerto Rico
  10. 3.1 4 km N of San Juan, Puerto Rico
  11. 2.9 2 km NW of Sabana, Puerto Rico
  12. 2.1 7 km S of Salinas, Puerto Rico
  13. 2.2 5 km ENE of Comerío, Puerto Rico
  14. 2.2 3 km SSW of Salinas, Puerto Rico
  15. 2.0 8 km S of Salinas, 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.