QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near Puerto Real, PR

No earthquake was likely felt in Puerto Real in the 24 hours to 6:01 pm AST (22:01 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 2.7 earthquake was recorded 46 km (29 mi) west-southwest of Puerto Real, PR, at 2:49 am AST on 1 May 2018 (06:49 UTC), 33 km deep.

USGS: 42 km WSW of Pole Ojea, Puerto Rico

58 km (36 mi) SW of Mayagüez, PR · 101 km (63 mi) W of Ponce, PR

2:49 am AST, May 1, 2018 · · 33 km deep · released about 380 lb of TNT

Every earthquake near Puerto Real Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mayagüez Municipio 42 kmCabo Rojo Municipio 43 kmHormigueros Municipio 56 kmLajas Municipio 57 kmSan Germán Municipio 62 kmRincón Municipio 62 kmAñasco Municipio 66 kmGuánica Municipio 69 kmAguada Municipio 69 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
2:49 am AST on 1 May 2018 ()
Where
46 km (29 mi) west-southwest of Puerto Real, PR · earthquakes near Puerto Real
Magnitude
M 2.7 (md)
Depth
33 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 42 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3117 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 Puerto Real, 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 380 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 40,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 29,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 380 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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

  1. 5.2 19 km SW of Stella, Puerto Rico · 41 km NNE of this epicentre
  2. 5.1 21 km SW of Stella, Puerto Rico · 40 km NNE 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 17.8656, -67.5658. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Mayagüez Municipio, PR 42 km (26 mi) NW earthquakes near Mayagüez Municipio
Cabo Rojo Municipio, PR 43 km (27 mi) ENE earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 56 km (35 mi) ENE earthquakes near Hormigueros Municipio
Lajas Municipio, PR 57 km (35 mi) ENE earthquakes near Lajas Municipio
San Germán Municipio, PR 62 km (39 mi) ENE earthquakes near San Germán Municipio
Rincón Municipio, PR 62 km (39 mi) NNE earthquakes near Rincón Municipio

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

Aftershocks so far

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

  1. 2.4 26 km W of Puerto Real, Puerto Rico
  2. 2.0 7 km NW of Puerto Real, Puerto Rico
  3. 2.1 28 km SW of Pole Ojea, Puerto Rico
  4. 2.0 17 km WSW of Pole Ojea, Puerto Rico
  5. 1.7 11 km S of Pole Ojea, Puerto Rico
  6. 2.7 21 km WSW of Stella, Puerto Rico
  7. 3.2 80 km W of Pole Ojea, Puerto Rico
  8. 2.6 11 km W of Pole Ojea, Puerto Rico
  9. 2.7 11 km W of Puerto Real, Puerto Rico
  10. 1.6 13 km W of Mayagüez, Puerto Rico
  11. 2.5 18 km W of Puerto Real, Puerto Rico
  12. 2.3 19 km SW of Stella, Puerto Rico
  13. 2.2 6 km S of Pole Ojea, Puerto Rico
  14. 2.4 18 km SW of Stella, Puerto Rico
  15. 2.6 13 km S of Pole Ojea, 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.