QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

Earthquake near Rincón, PR

No earthquake was likely felt in Rincón in the 24 hours to 10:48 am AST (14:48 UTC). The last one was M 3.4, 53 km (33 mi) NNE, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Rincón

This page: a magnitude 3.6 earthquake was recorded 46 km (28 mi) west-southwest of Rincón, PR, at 3:16 pm AST on 13 August 2026 (19:16 UTC), 104 km deep.

USGS: 45 km WSW of Stella, Puerto Rico

55 km (34 mi) W of Mayagüez, PR · 113 km (70 mi) WNW of Ponce, PR

3:16 pm AST, Aug 13, 2026 · · 104 km deep · released about 3.3 tons of TNT

Every earthquake near Rincón Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mayagüez Municipio 28 kmRincón Municipio 46 kmAguada Municipio 53 kmAñasco Municipio 57 kmCabo Rojo Municipio 57 kmHormigueros Municipio 59 kmAguadilla Municipio 62 kmMoca Municipio 64 kmSan Germán Municipio 68 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
3:16 pm AST on 13 August 2026 ()
Where
46 km (28 mi) west-southwest of Rincón, PR · earthquakes near Rincón
Magnitude
M 3.6 (md)
Depth
104 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 28 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 77 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 it was probably too small to be felt, even directly above it. In Rincón, 46 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 4.4 on 2017-10-01 — about 18 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 6.3 58 km E of Punta Cana, Dominican Republic · 37 km NNW of this epicentre
  2. 5.2 19 km SW of Stella, Puerto Rico · 31 km E of this epicentre
  3. 5.1 21 km SW of Stella, Puerto Rico · 32 km E 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 18.2241, -67.6655. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Mayagüez Municipio, PR 28 km (17 mi) WSW earthquakes near Mayagüez Municipio
Rincón Municipio, PR 46 km (28 mi) ENE earthquakes near Rincón Municipio
Aguada Municipio, PR 53 km (33 mi) ENE earthquakes near Aguada Municipio
Añasco Municipio, PR 57 km (35 mi) E earthquakes near Añasco Municipio
Cabo Rojo Municipio, PR 57 km (35 mi) ESE earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 59 km (37 mi) E earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 2.8 8 km NW of Puerto Real, Puerto Rico
  2. 3.3 39 km WSW of Stella, Puerto Rico
  3. 2.9 25 km WNW of Puerto Real, Puerto Rico
  4. 2.8 11 km W of Mayagüez, Puerto Rico
  5. 3.6 51 km SE of Punta Cana, Dominican Republic
  6. 2.7 3 km SSW of La Playa, Puerto Rico
  7. 2.9 19 km NW of Rincón, Puerto Rico
  8. 3.9 19 km NW of Rincón, Puerto Rico
  9. 3.2 65 km SE of Punta Cana, Dominican Republic
  10. 3.4 62 km W of Rincón, Puerto Rico
  11. 3.1 8 km NW of Puerto Real, Puerto Rico
  12. 2.9 18 km W of Rincón, Puerto Rico
  13. 2.5 15 km W of Pole Ojea, Puerto Rico
  14. 2.7 20 km SW of Stella, Puerto Rico
  15. 3.0 31 km WSW of Stella, 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.