QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near Maricao, PR

No earthquake was likely felt in Maricao in the 24 hours to 4:38 pm AST (20:38 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 2.7 earthquake was recorded 4 km (3 mi) southwest of Maricao, PR, at 8:02 pm AST on 5 July 2023 (00:02 UTC), 22 km deep.

USGS: 4 km SW of Maricao, Puerto Rico

15 km (10 mi) ESE of Mayagüez, PR · 103 km (64 mi) WSW of San Juan, PR

8:02 pm AST, Jul 5, 2023 · · 22 km deep · released about 320 lb of TNT

Every earthquake near Maricao Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Germán Municipio 6 kmMaricao Municipio 8 kmLas Marías Municipio 9 kmSabana Grande Municipio 10 kmHormigueros Municipio 12 kmYauco Municipio 17 kmLajas Municipio 20 kmLares Municipio 20 kmAñasco Municipio 20 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
8:02 pm AST on 5 July 2023 ()
Where
4 km (3 mi) southwest of Maricao, PR · earthquakes near Maricao
Magnitude
M 2.7 (md)
Depth
22 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 6 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1225 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 11 km (7 mi) from the epicentre. In Maricao, 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.

Likely felt in: San Germán 9 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 320 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 48,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 34,000× the energy of this one
  3. Around the size people start to feel M 3.0 3× the energy of this one
  4. This earthquake M 2.7 about 320 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 380,000 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 · 39 km NW of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 28 km NNW of this epicentre
  3. 5.2 19 km SW of Stella, Puerto Rico · 39 km W of this epicentre
  4. 5.1 21 km SW of Stella, Puerto Rico · 39 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 18.1522, -67.0048. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Germán Municipio, PR 6 km (4 mi) SW earthquakes near San Germán Municipio
Maricao Municipio, PR 8 km (5 mi) ENE earthquakes near Maricao Municipio
Las Marías Municipio, PR 9 km (6 mi) NNE earthquakes near Las Marías Municipio
Sabana Grande Municipio, PR 10 km (6 mi) SE earthquakes near Sabana Grande Municipio
Hormigueros Municipio, PR 12 km (7 mi) W earthquakes near Hormigueros Municipio
Yauco Municipio, PR 17 km (11 mi) ESE earthquakes near Yauco Municipio

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

Aftershocks so far

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

  1. 2.1 5 km SE of Maria Antonia, Puerto Rico
  2. 2.8 5 km W of Boquerón, Puerto Rico
  3. 2.7 1 km N of Indios, Puerto Rico
  4. 2.0 3 km ESE of Maria Antonia, Puerto Rico
  5. 2.5 3 km ESE of Maria Antonia, Puerto Rico
  6. 2.1 Puerto Rico region
  7. 2.8 4 km WNW of Boquerón, Puerto Rico
  8. 2.7 5 km W of Boquerón, Puerto Rico
  9. 3.1 5 km W of Boquerón, Puerto Rico
  10. 2.1 8 km WSW of La Parguera, Puerto Rico
  11. 3.5 Mona Passage
  12. 2.4 6 km E of La Parguera, Puerto Rico
  13. 2.2 Puerto Rico region
  14. 2.9 1 km WSW of Indios, Puerto Rico
  15. 2.5 8 km S 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.