QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Guánica, PR

No earthquake was likely felt in Guánica in the 24 hours to 11:23 am AST (15:23 UTC). The last one was M 2.1, 13 km (8 mi) ENE, at 4:39 pm AST on 9 November 2026, estimated intensity II (weak) in town. Every earthquake near Guánica

This page: a magnitude 2.4 earthquake was recorded 4 km (2 mi) northwest of Guánica, PR, at 3:49 pm AST on 2 September 2023 (19:49 UTC), 13 km deep.

USGS: Puerto Rico region

32 km (20 mi) W of Ponce, PR

3:49 pm AST, Sep 2, 2023 · · 13 km deep · released about 130 lb of TNT

Every earthquake near Guánica Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 6 kmSabana Grande Municipio 10 kmLajas Municipio 12 kmYauco Municipio 12 kmGuayanilla Municipio 14 kmSan Germán Municipio 17 kmMaricao Municipio 20 kmPeñuelas Municipio 21 kmHormigueros Municipio 25 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
3:49 pm AST on 2 September 2023 ()
Where
4 km (2 mi) northwest of Guánica, PR · earthquakes near Guánica
Magnitude
M 2.4 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 6 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1166 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 17 km (11 mi) from the epicentre. In Guánica, 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: Yauco 9 km, intensity II · Guayanilla 14 km, intensity II · San Germán 16 km, intensity II · Magas Arriba 17 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 130 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 80,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.2× the energy of this one
  4. This earthquake M 2.4 about 130 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 in our catalogue was M 6.4 on 2020-01-07 — about 900,000 times the energy of this one.

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 17.9977, -66.9267. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 6 km (3 mi) S earthquakes near Guánica Municipio
Sabana Grande Municipio, PR 10 km (6 mi) NNW earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 12 km (8 mi) W earthquakes near Lajas Municipio
Yauco Municipio, PR 12 km (8 mi) NE earthquakes near Yauco Municipio
Guayanilla Municipio, PR 14 km (8 mi) E earthquakes near Guayanilla Municipio
San Germán Municipio, PR 17 km (11 mi) NW earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 2.1 18 km SSW of Guánica, Puerto Rico
  2. 3.2 Puerto Rico region
  3. 2.8 Puerto Rico region
  4. 3.4 6 km WSW of Guánica, Puerto Rico
  5. 2.6 3 km WSW of Indios, Puerto Rico
  6. 2.4 6 km NNE of Lluveras, Puerto Rico
  7. 2.4 13 km SSE of Guánica, Puerto Rico
  8. 2.6 9 km SSE of Guánica, Puerto Rico
  9. 2.3 4 km NNE of Lluveras, Puerto Rico
  10. 2.7 8 km SSE of Guánica, Puerto Rico
  11. 3.0 12 km SSE of Tallaboa, Puerto Rico
  12. 2.3 0 km ESE of Fuig, Puerto Rico
  13. 2.4 1 km S of Palmarejo, Puerto Rico
  14. 1.9 Puerto Rico region
  15. 2.7 3 km SW 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.