QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Earthquake near Guánica, PR

No earthquake was likely felt in Guánica in the 24 hours to 12:56 pm AST (16:56 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 2.9 earthquake was recorded 14 km (9 mi) south of Guánica, PR, at 9:27 pm AST on 6 August 2022 (01:27 UTC), 11 km deep.

USGS: 13 km S of Guánica, Puerto Rico

34 km (21 mi) WSW of Ponce, PR

9:27 pm AST, Aug 6, 2022 · · 11 km deep · released about 650 lb of TNT

Every earthquake near Guánica Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 11 kmLajas Municipio 21 kmGuayanilla Municipio 21 kmSabana Grande Municipio 27 kmYauco Municipio 27 kmPeñuelas Municipio 27 kmSan Germán Municipio 32 kmCabo Rojo Municipio 34 kmPonce Municipio 36 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
9:27 pm AST on 6 August 2022 ()
Where
14 km (9 mi) south of Guánica, PR · earthquakes near Guánica
Magnitude
M 2.9 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 11 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1558 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 29 km (18 mi) from the epicentre. In Guánica, 14 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 22 km, intensity II · Guayanilla 22 km, intensity II · Magas Arriba 24 km, intensity II · Tallaboa 26 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 650 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 23,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 650 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 since 2016 was M 6.4 on 2020-01-07 — about 180,000 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 17.8472, -66.9022. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 11 km (7 mi) N earthquakes near Guánica Municipio
Lajas Municipio, PR 21 km (13 mi) NW earthquakes near Lajas Municipio
Guayanilla Municipio, PR 21 km (13 mi) NNE earthquakes near Guayanilla Municipio
Sabana Grande Municipio, PR 27 km (17 mi) N earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 27 km (17 mi) N earthquakes near Yauco Municipio
Peñuelas Municipio, PR 27 km (17 mi) NE earthquakes near Peñuelas 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. 2.6 6 km WSW of Fuig, Puerto Rico
  2. 2.0 2 km SE of Maria Antonia, Puerto Rico
  3. 1.9 2 km WSW of Indios, Puerto Rico
  4. 2.2 1 km WSW of Indios, Puerto Rico
  5. 2.6 10 km SSE of Maria Antonia, Puerto Rico
  6. 2.2 9 km SSW of Guánica, Puerto Rico
  7. 2.0 2 km WNW of Indios, Puerto Rico
  8. 2.8 3 km SW of Indios, Puerto Rico
  9. 2.3 2 km WSW of Indios, Puerto Rico
  10. 2.2 2 km WSW of Indios, Puerto Rico
  11. 2.2 2 km WSW of Indios, Puerto Rico
  12. 2.1 1 km WSW of Indios, Puerto Rico
  13. 2.0 1 km SW of Indios, Puerto Rico
  14. 2.3 2 km WSW of Indios, Puerto Rico
  15. 1.7 2 km WNW 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.