QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Cabo Rojo, PR

No earthquake was likely felt in Cabo Rojo in the 24 hours to 12:52 pm AST (16:52 UTC). The last one was M 2.1, 9 km (6 mi) SSE, at 11:57 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Cabo Rojo

This page: a magnitude 2.4 earthquake was recorded 3 km (2 mi) south of Cabo Rojo, PR, at 4:40 pm AST on 17 August 2026 (20:40 UTC), 6.1 km deep.

USGS: 3 km S of Cabo Rojo, Puerto Rico

16 km (10 mi) S of Mayagüez, PR · 121 km (75 mi) WSW of San Juan, PR

4:40 pm AST, Aug 17, 2026 · · 6.1 km deep · released about 110 lb of TNT

Every earthquake near Cabo Rojo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cabo Rojo Municipio 8 kmHormigueros Municipio 9 kmSan Germán Municipio 13 kmLajas Municipio 14 kmSabana Grande Municipio 21 kmAñasco Municipio 26 kmMaricao Municipio 26 kmLas Marías Municipio 26 kmGuánica Municipio 27 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
4:40 pm AST on 17 August 2026 ()
Where
3 km (2 mi) south of Cabo Rojo, PR · earthquakes near Cabo Rojo
Magnitude
M 2.4 (md)
Depth
6.1 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 8 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 86 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 20 km (12 mi) from the epicentre. In Cabo Rojo, 3 km away, the estimate is intensity III (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: Puerto Real 5 km, intensity III · Pole Ojea 10 km, intensity II · San Germán 11 km, intensity II · Mayagüez 16 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 99,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.8× the energy of this one
  4. This earthquake M 2.4 about 110 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 6.4 on 2020-01-07 — about 1,100,000 times the energy of this one.

Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 43 km N of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 39 km NNE of this epicentre
  3. 5.2 19 km SW of Stella, Puerto Rico · 28 km WNW of this epicentre
  4. 5.1 21 km SW of Stella, Puerto Rico · 27 km WNW 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 18.0575, -67.1480. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Cabo Rojo Municipio, PR 8 km (5 mi) SSW earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 9 km (6 mi) NNE earthquakes near Hormigueros Municipio
San Germán Municipio, PR 13 km (8 mi) ENE earthquakes near San Germán Municipio
Lajas Municipio, PR 14 km (9 mi) SE earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 21 km (13 mi) E earthquakes near Sabana Grande Municipio
Añasco Municipio, PR 26 km (16 mi) N earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 1.6 11 km SSE of La Parguera, Puerto Rico
  2. 2.3 2 km ENE of Maria Antonia, Puerto Rico
  3. 1.9 10 km SSE of Indios, Puerto Rico
  4. 2.6 6 km SW of Guánica, Puerto Rico
  5. 2.7 3 km ENE of Sabana Grande, Puerto Rico
  6. 2.9 3 km SSE of Magas Arriba, Puerto Rico
  7. 2.4 7 km SE of Maria Antonia, Puerto Rico
  8. 2.3 1 km SSW of Guánica, Puerto Rico
  9. 3.2 8 km WNW of Maricao, Puerto Rico
  10. 2.4 0 km W of Indios, Puerto Rico
  11. 2.2 2 km NNW of Guayanilla, Puerto Rico
  12. 2.9 0 km S of Indios, Puerto Rico
  13. 2.2 0 km WSW of Magas Arriba, Puerto Rico
  14. 2.3 0 km S of Tallaboa, Puerto Rico
  15. 2.1 7 km SE of Maria Antonia, 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.