QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Puerto Real, PR

No earthquake was likely felt in Puerto Real in the 24 hours to 12:54 am AST (04:54 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 2.5 earthquake was recorded 29 km (18 mi) west of Puerto Real, PR, at 4:29 pm AST on 13 May 2018 (20:29 UTC), 12 km deep.

USGS: 28 km W of Puerto Real, Puerto Rico

88 km (55 mi) W of Ponce, PR · 37 km (23 mi) WSW of Mayagüez, PR

4:29 pm AST, May 13, 2018 · · 12 km deep · released about 180 lb of TNT

Every earthquake near Puerto Real Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cabo Rojo Municipio 30 kmHormigueros Municipio 37 kmRincón Municipio 38 kmAñasco Municipio 43 kmSan Germán Municipio 45 kmLajas Municipio 45 kmAguada Municipio 45 kmMayagüez Municipio 46 kmMoca Municipio 53 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
4:29 pm AST on 13 May 2018 ()
Where
29 km (18 mi) west of Puerto Real, PR · earthquakes near Puerto Real
Magnitude
M 2.5 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 30 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3104 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, people at rest would likely notice it out to about 19 km (12 mi) from the epicentre. In Puerto Real, 29 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 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 86,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 61,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.4× the energy of this one
  4. This earthquake M 2.5 about 180 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 480 times the energy of this one.

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

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 50 km NNE of this epicentre
  2. 5.2 19 km SW of Stella, Puerto Rico · 17 km NNE of this epicentre
  3. 5.1 21 km SW of Stella, Puerto Rico · 15 km NE 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 18.0598, -67.4563. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Cabo Rojo Municipio, PR 30 km (19 mi) ESE earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 37 km (23 mi) ENE earthquakes near Hormigueros Municipio
Rincón Municipio, PR 38 km (24 mi) NE earthquakes near Rincón Municipio
Añasco Municipio, PR 43 km (26 mi) NE earthquakes near Añasco Municipio
San Germán Municipio, PR 45 km (28 mi) E earthquakes near San Germán Municipio
Lajas Municipio, PR 45 km (28 mi) ESE earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 1.8 6 km SW of Mayagüez, Puerto Rico
  2. 1.9 3 km NE of Hormigueros, Puerto Rico
  3. 2.3 23 km NW of Rincón, Puerto Rico
  4. 3.2 36 km WNW of Rincón, Puerto Rico
  5. 2.2 1 km NNE of Hormigueros, Puerto Rico
  6. 2.6 38 km WSW of Stella, Puerto Rico
  7. 2.4 26 km SW of Stella, Puerto Rico
  8. 2.4 26 km W of Puerto Real, Puerto Rico
  9. 2.0 7 km NW of Puerto Real, Puerto Rico
  10. 2.3 6 km WNW of Rincón, Puerto Rico
  11. 2.1 28 km SW of Pole Ojea, Puerto Rico
  12. 2.0 17 km WSW of Pole Ojea, Puerto Rico
  13. 1.7 11 km S of Pole Ojea, Puerto Rico
  14. 2.3 5 km NNW of Rincón, Puerto Rico
  15. 1.6 2 km SSW of Sabana Eneas, 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.