QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

Earthquake near Puerto Real, PR

No earthquake was likely felt in Puerto Real in the 24 hours to 12:54 pm AST (16:54 UTC). The last one was M 2.1, 10 km (6 mi) SE, at 11:57 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Puerto Real

This page: a magnitude 2.3 earthquake was recorded 4 km (3 mi) north of Puerto Real, PR, at 11:16 pm AST on 31 May 2019 (03:16 UTC), 19 km deep.

USGS: 4 km N of Puerto Real, Puerto Rico

11 km (7 mi) SSW of Mayagüez, PR · 123 km (76 mi) WSW of San Juan, PR

11:16 pm AST, May 31, 2019 · · 19 km deep · released about 74 lb of TNT

Every earthquake near Puerto Real Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hormigueros Municipio 7 kmCabo Rojo Municipio 13 kmSan Germán Municipio 15 kmAñasco Municipio 20 kmLajas Municipio 21 kmSabana Grande Municipio 25 kmLas Marías Municipio 25 kmRincón Municipio 26 kmMaricao 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
11:16 pm AST on 31 May 2019 ()
Where
4 km (3 mi) north of Puerto Real, PR · earthquakes near Puerto Real
Magnitude
M 2.3 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 7 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2720 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 3 km (2 mi) from the epicentre. In Puerto Real, 4 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: Cabo Rojo, Hormigueros, Monte Grande, Boquerón, Mayagüez, Sabana Eneas.

How big was it?

This earthquake released about 74 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 74 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 4.3 on 2017-10-14 — about 1,100 times the energy of this one.

Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 37 km N of this epicentre
  2. 6.1 15 km WNW of San Antonio, Puerto Rico · 49 km N of this epicentre
  3. 5.8 4 km E of Moca, Puerto Rico · 34 km NNE of this epicentre
  4. 5.2 19 km SW of Stella, Puerto Rico · 21 km WNW of this epicentre
  5. 5.1 21 km SW of Stella, Puerto Rico · 21 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 18.1135, -67.1826. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hormigueros Municipio, PR 7 km (5 mi) ENE earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 13 km (8 mi) S earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 15 km (10 mi) E earthquakes near San Germán Municipio
Añasco Municipio, PR 20 km (12 mi) NNE earthquakes near Añasco Municipio
Lajas Municipio, PR 21 km (13 mi) SE earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 25 km (16 mi) E earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 2.1 5 km SSW of La Parguera, Puerto Rico
  2. 1.8 6 km SSW of La Parguera, Puerto Rico
  3. 1.9 19 km SW of Stella, Puerto Rico
  4. 1.8 1 km NNW of Boquerón, Puerto Rico
  5. 2.1 2 km ENE of Rafael Hernandez, Puerto Rico
  6. 2.1 3 km S of Monte Grande, Puerto Rico
  7. 2.1 20 km SSW of Pole Ojea, Puerto Rico
  8. 2.4 8 km NW of Aguada, Puerto Rico
  9. 2.5 5 km WNW of Aguada, Puerto Rico
  10. 1.8 4 km NE of Yauco, Puerto Rico
  11. 1.8 18 km SW of Stella, Puerto Rico
  12. 1.6 3 km W of Tallaboa, Puerto Rico
  13. 1.5 6 km NNE of Lluveras, Puerto Rico
  14. 1.8 14 km WSW of Puerto Real, Puerto Rico
  15. 2.4 3 km SSW of La Playa, 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.