QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Guánica, PR

Yes: an earthquake was likely felt in Guánica in the last 24 hours. M 2.1, 7 km (4 mi) ENE of Guánica, at 4:14 pm AST on 11 November 2026 (20:14 UTC); the estimated shaking in Guánica was intensity II (weak). Every earthquake near Guánica

This page: a magnitude 2.4 earthquake was recorded 6 km (3 mi) west-northwest of Guánica, PR, at 5:49 am AST on 22 September 2023 (09:49 UTC), 14 km deep.

USGS: Puerto Rico region

35 km (22 mi) W of Ponce, PR · 30 km (19 mi) SE of Mayagüez, PR

5:49 am AST, Sep 22, 2023 · · 14 km deep · released about 120 lb of TNT

Every earthquake near Guánica Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 6 kmLajas Municipio 10 kmSabana Grande Municipio 10 kmYauco Municipio 14 kmSan Germán Municipio 15 kmGuayanilla Municipio 16 kmMaricao Municipio 20 kmHormigueros Municipio 23 kmPeñuelas 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
5:49 am AST on 22 September 2023 ()
Where
6 km (3 mi) west-northwest of Guánica, PR · earthquakes near Guánica
Magnitude
M 2.4 (md)
Depth
14 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 1146 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, 6 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 12 km, intensity II · San Germán 13 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 120 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 5.8 120,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 86,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.7× the energy of this one
  4. This earthquake M 2.4 about 120 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 970,000 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 17.9988, -66.9527. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 6 km (4 mi) SSE earthquakes near Guánica Municipio
Lajas Municipio, PR 10 km (6 mi) WSW earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 10 km (6 mi) N earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 14 km (9 mi) NE earthquakes near Yauco Municipio
San Germán Municipio, PR 15 km (9 mi) NW earthquakes near San Germán Municipio
Guayanilla Municipio, PR 16 km (10 mi) E earthquakes near Guayanilla 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 8 km SSE of Maria Antonia, Puerto Rico
  2. 2.4 8 km SSE of Maria Antonia, Puerto Rico
  3. 1.8 5 km SE of Maria Antonia, Puerto Rico
  4. 2.8 10 km SSE of Maria Antonia, Puerto Rico
  5. 2.6 9 km SSE of Maria Antonia, Puerto Rico
  6. 3.0 8 km SSE of Maria Antonia, Puerto Rico
  7. 2.8 2 km ESE of Magas Arriba, Puerto Rico
  8. 2.4 4 km SE of La Parguera, Puerto Rico
  9. 2.2 Puerto Rico region
  10. 2.4 11 km SSE of Maria Antonia, Puerto Rico
  11. 2.1 1 km NNW of Guayanilla, Puerto Rico
  12. 2.9 1 km NNW of Magas Arriba, Puerto Rico
  13. 2.3 6 km SW of Gu?nica, Puerto Rico
  14. 2.9 3 km WSW of Guánica, Puerto Rico
  15. 2.4 6 km SSE of Maria Antonia, 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.