QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near Guánica, PR

No earthquake was likely felt in Guánica in the 24 hours to 2:35 pm AST (18:35 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 2.7 earthquake was recorded 10 km (6 mi) west of Guánica, PR, at 10:58 pm AST on 11 March 2023 (02:58 UTC), 7.6 km deep.

USGS: Puerto Rico region

41 km (25 mi) W of Ponce, PR · 30 km (18 mi) SSE of Mayagüez, PR

10:58 pm AST, Mar 11, 2023 · · 7.6 km deep · released about 330 lb of TNT

Every earthquake near Guánica Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lajas Municipio 4 kmGuánica Municipio 9 kmSabana Grande Municipio 14 kmSan Germán Municipio 16 kmCabo Rojo Municipio 19 kmYauco Municipio 20 kmHormigueros Municipio 22 kmGuayanilla Municipio 22 kmMaricao 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
10:58 pm AST on 11 March 2023 ()
Where
10 km (6 mi) west of Guánica, PR · earthquakes near Guánica
Magnitude
M 2.7 (md)
Depth
7.6 km below the surface
Felt
no reports yet
Nearest
Lajas Municipio, 4 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1341 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 24 km (15 mi) from the epicentre. In Guánica, 10 km away, the estimate is intensity III (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 13 km, intensity II · Yauco 18 km, intensity II · Pole Ojea 19 km, intensity II · Puerto Real 23 km, intensity II · Guayanilla 23 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 330 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 46,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 33,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.9× the energy of this one
  4. This earthquake M 2.7 about 330 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 370,000 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 17.9673, -67.0055. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Lajas Municipio, PR 4 km (2 mi) WNW earthquakes near Lajas Municipio
Guánica Municipio, PR 9 km (6 mi) ESE earthquakes near Guánica Municipio
Sabana Grande Municipio, PR 14 km (9 mi) NNE earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 16 km (10 mi) NNW earthquakes near San Germán Municipio
Cabo Rojo Municipio, PR 19 km (12 mi) W earthquakes near Cabo Rojo Municipio
Yauco Municipio, PR 20 km (13 mi) NE earthquakes near Yauco 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. 2.4 5 km WSW of Guánica, Puerto Rico
  2. 2.3 3 km WNW of Fuig, Puerto Rico
  3. 2.4 5 km WSW of Guánica, Puerto Rico
  4. 2.4 5 km WSW of Guánica, Puerto Rico
  5. 2.8 Puerto Rico region
  6. 3.5 5 km SW of Guánica, Puerto Rico
  7. 2.3 4 km W of Fuig, Puerto Rico
  8. 2.4 4 km WSW of Fuig, Puerto Rico
  9. 2.3 Puerto Rico region
  10. 2.5 1 km ESE of Palmarejo, Puerto Rico
  11. 2.4 5 km WSW of Fuig, Puerto Rico
  12. 2.3 5 km SW of Guánica, Puerto Rico
  13. 2.2 6 km SW of Guánica, Puerto Rico
  14. 2.8 6 km SW of Guánica, Puerto Rico
  15. 2.4 5 km WSW of Guánica, 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.