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 3:24 pm AST (19:24 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 (3 mi) northwest of Guánica, PR, at 11:00 am AST on 1 September 2023 (15:00 UTC), 13 km deep.

USGS: Puerto Rico region

33 km (21 mi) W of Ponce, PR · 31 km (19 mi) SE of Mayagüez, PR

11:00 am AST, Sep 1, 2023 · · 13 km deep · released about 110 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 11 kmYauco Municipio 13 kmGuayanilla Municipio 15 kmSan Germán Municipio 16 kmMaricao Municipio 19 kmPeñuelas Municipio 22 kmHormigueros Municipio 24 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
11:00 am AST on 1 September 2023 ()
Where
4 km (3 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 SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1167 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 16 km (10 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 10 km, intensity II · San Germán 15 km, intensity II · Guayanilla 16 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 110 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 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 99,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.8× the energy of this one
  4. This earthquake M 2.4 about 110 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 1,100,000 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 17.9995, -66.9370. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 6 km (4 mi) SSE earthquakes near Guánica Municipio
Sabana Grande Municipio, PR 10 km (6 mi) N earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 11 km (7 mi) WSW earthquakes near Lajas Municipio
Yauco Municipio, PR 13 km (8 mi) NE earthquakes near Yauco Municipio
Guayanilla Municipio, PR 15 km (9 mi) E earthquakes near Guayanilla Municipio
San Germán Municipio, PR 16 km (10 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

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

  1. 2.7 1 km SSW of Magas Arriba, Puerto Rico
  2. 2.3 1 km SSW of Ponce, Puerto Rico
  3. 2.4 0 km WSW of Ponce, Puerto Rico
  4. 2.3 3 km S of Guánica, Puerto Rico
  5. 2.5 3 km SW of Indios, Puerto Rico
  6. 2.4 4 km SW of Guánica, Puerto Rico
  7. 2.3 Puerto Rico region
  8. 3.0 4 km SSW of Guánica, Puerto Rico
  9. 2.1 2 km WNW of Guayanilla, Puerto Rico
  10. 2.4 Puerto Rico region
  11. 2.5 2 km E of Yauco, Puerto Rico
  12. 2.4 2 km WSW of Guánica, Puerto Rico
  13. 2.5 5 km SSE of Indios, Puerto Rico
  14. 2.4 9 km SSW of Guánica, Puerto Rico
  15. 2.4 1 km N 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.