QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

Earthquake near Boquerón, PR

No earthquake was likely felt in Boquerón in the 24 hours to 12:09 pm AST (16:09 UTC). The last one was M 2.1, 6 km (4 mi) ESE, at 11:57 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Boquerón

This page: a magnitude 1.9 earthquake was recorded 3 km (2 mi) southeast of Boquerón, PR, at 3:37 pm AST on 31 May 2026 (19:37 UTC), 14 km deep.

USGS: 3 km SE of Boquerón, Puerto Rico

22 km (13 mi) S of Mayagüez, PR · 122 km (76 mi) WSW of San Juan, PR

3:37 pm AST, May 31, 2026 · · 14 km deep · released about 19 lb of TNT

Every earthquake near Boquerón Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cabo Rojo Municipio 4 kmLajas Municipio 11 kmHormigueros Municipio 14 kmSan Germán Municipio 16 kmSabana Grande Municipio 22 kmGuánica Municipio 24 kmMaricao Municipio 29 kmLas Marías Municipio 30 kmAñasco Municipio 31 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
3:37 pm AST on 31 May 2026 ()
Where
3 km (2 mi) southeast of Boquerón, PR · earthquakes near Boquerón
Magnitude
M 1.9 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 4 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 164 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 2 km (1 mi) from the epicentre. In Boquerón, 3 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: Pole Ojea, Palmarejo, Puerto Real, Cabo Rojo, Monte Grande, Lajas.

How big was it?

This earthquake released about 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× the energy of this one
  4. This earthquake M 1.9 about 19 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 6,200,000 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 · 49 km N of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 44 km N of this epicentre
  3. 5.2 19 km SW of Stella, Puerto Rico · 31 km NW of this epicentre
  4. 5.1 21 km SW of Stella, Puerto Rico · 30 km NW 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 18.0077, -67.1440. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Cabo Rojo Municipio, PR 4 km (3 mi) WSW earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 11 km (7 mi) ESE earthquakes near Lajas Municipio
Hormigueros Municipio, PR 14 km (9 mi) NNE earthquakes near Hormigueros Municipio
San Germán Municipio, PR 16 km (10 mi) NE earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 22 km (14 mi) ENE earthquakes near Sabana Grande Municipio
Guánica Municipio, PR 24 km (15 mi) ESE earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 1.9 1 km S of Indios, Puerto Rico
  2. 2.4 2 km SSW of Magas Arriba, Puerto Rico
  3. 2.1 2 km S of Maricao, Puerto Rico
  4. 2.0 1 km S of Maricao, Puerto Rico
  5. 2.7 2 km SW of Maricao, Puerto Rico
  6. 2.5 5 km NE of San Germán, Puerto Rico
  7. 1.8 3 km ESE of La Parguera, Puerto Rico
  8. 2.2 9 km SSW of Guánica, Puerto Rico
  9. 2.4 3 km SW of Maricao, Puerto Rico
  10. 1.9 2 km NNW of Guayanilla, Puerto Rico
  11. 2.5 1 km NNE of Guayanilla, Puerto Rico
  12. 2.8 2 km NNE of Guayanilla, Puerto Rico
  13. 2.0 1 km NNE of Guayanilla, Puerto Rico
  14. 2.0 4 km SW of Adjuntas, Puerto Rico
  15. 2.1 12 km SSW of Guánica, 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.