QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Maricao, PR

No earthquake was likely felt in Maricao in the 24 hours to 11:32 am AST (15:32 UTC). The last one was M 3.0, 33 km (20 mi) SSE, at 3:45 am AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Maricao

This page: a magnitude 2.5 earthquake was recorded 7 km (4 mi) east-southeast of Maricao, PR, at 9:04 am AST on 31 May 2026 (13:04 UTC), 16 km deep.

USGS: 6 km ESE of Maricao, Puerto Rico

36 km (23 mi) WNW of Ponce, PR · 24 km (15 mi) E of Mayagüez, PR

9:04 am AST, May 31, 2026 · · 16 km deep · released about 150 lb of TNT

Every earthquake near Maricao Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Maricao Municipio 2 kmLas Marías Municipio 9 kmSabana Grande Municipio 9 kmYauco Municipio 11 kmLares Municipio 14 kmSan Germán Municipio 14 kmAdjuntas Municipio 17 kmSan Sebastián Municipio 19 kmHormigueros Municipio 21 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
9:04 am AST on 31 May 2026 ()
Where
7 km (4 mi) east-southeast of Maricao, PR · earthquakes near Maricao
Magnitude
M 2.5 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 2 km WNW
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 15 km (9 mi) from the epicentre. In Maricao, 7 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: Sabana Grande, Liborio Negron Torres, Lluveras, Lares, San Germán, Yauco.

How big was it?

This earthquake released about 150 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 5.8 100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 72,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.5× the energy of this one
  4. This earthquake M 2.5 about 150 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 810,000 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 · 44 km NW of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 31 km NNW of this epicentre
  3. 5.2 19 km SW of Stella, Puerto Rico · 48 km W of this epicentre
  4. 5.1 21 km SW of Stella, Puerto Rico · 48 km W 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 18.1645, -66.9203. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Maricao Municipio, PR 2 km (1 mi) WNW earthquakes near Maricao Municipio
Las Marías Municipio, PR 9 km (6 mi) NW earthquakes near Las Marías Municipio
Sabana Grande Municipio, PR 9 km (6 mi) SSW earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 11 km (7 mi) SE earthquakes near Yauco Municipio
Lares Municipio, PR 14 km (8 mi) NNE earthquakes near Lares Municipio
San Germán Municipio, PR 14 km (9 mi) WSW earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 1.9 2 km NNW of Guayanilla, Puerto Rico
  2. 2.5 1 km NNE of Guayanilla, Puerto Rico
  3. 2.8 2 km NNE of Guayanilla, Puerto Rico
  4. 2.0 1 km NNE of Guayanilla, Puerto Rico
  5. 2.0 4 km SW of Adjuntas, Puerto Rico
  6. 2.1 12 km SSW of Guánica, Puerto Rico
  7. 1.9 5 km WSW of Guánica, Puerto Rico
  8. 2.2 12 km SSE of Lares, Puerto Rico
  9. 2.1 1 km NW of Santo Domingo, Puerto Rico
  10. 2.1 11 km SSW of Ponce, Puerto Rico
  11. 2.2 2 km N of Sabana Grande, Puerto Rico
  12. 3.0 6 km E of La Parguera, Puerto Rico
  13. 1.9 3 km NE of La Parguera, Puerto Rico
  14. 2.3 9 km S of Guánica, Puerto Rico
  15. 2.1 4 km ESE of Indios, 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.