QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

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 1.7 earthquake was recorded 7 km (5 mi) west-northwest of Guánica, PR, at 1:44 pm AST on 13 March 2023 (17:44 UTC), 4.6 km deep.

USGS: Puerto Rico region

36 km (23 mi) W of Ponce, PR · 28 km (18 mi) SE of Mayagüez, PR

1:44 pm AST, Mar 13, 2023 · · 4.6 km deep · released about 11 lb of TNT

Every earthquake near Guánica Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 8 kmLajas Municipio 8 kmSabana Grande Municipio 9 kmSan Germán Municipio 13 kmYauco Municipio 15 kmGuayanilla Municipio 18 kmMaricao Municipio 19 kmHormigueros Municipio 21 kmCabo Rojo Municipio 23 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
1:44 pm AST on 13 March 2023 ()
Where
7 km (5 mi) west-northwest of Guánica, PR · earthquakes near Guánica
Magnitude
M 1.7 (md)
Depth
4.6 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 8 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1339 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 12 km (7 mi) from the epicentre. In Guánica, 7 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 12 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 10,000,000 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 18.0065, -66.9680. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 8 km (5 mi) SE earthquakes near Guánica Municipio
Lajas Municipio, PR 8 km (5 mi) WSW earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 9 km (6 mi) NNE earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 13 km (8 mi) NNW earthquakes near San Germán Municipio
Yauco Municipio, PR 15 km (9 mi) NE earthquakes near Yauco Municipio
Guayanilla Municipio, PR 18 km (11 mi) E earthquakes near Guayanilla 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. 2.2 5 km WSW of Fuig, Puerto Rico
  2. 2.3 5 km WSW of Guánica, Puerto Rico
  3. 2.4 4 km WSW of Fuig, Puerto Rico
  4. 2.3 5 km WSW of Fuig, Puerto Rico
  5. 2.8 8 km SSE of Indios, Puerto Rico
  6. 2.6 5 km WSW of Guánica, Puerto Rico
  7. 2.2 Puerto Rico region
  8. 2.7 5 km WSW of Guánica, Puerto Rico
  9. 2.7 Puerto Rico region
  10. 3.1 5 km WSW of Guánica, Puerto Rico
  11. 2.2 4 km W of Fuig, Puerto Rico
  12. 2.4 Puerto Rico region
  13. 2.2 5 km WSW of Guánica, Puerto Rico
  14. 2.3 3 km WSW of Fuig, Puerto Rico
  15. 2.3 3 km SSE of Liborio Negron Torres, 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.