QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Earthquake near Tallaboa, PR

No earthquake was likely felt in Tallaboa in the 24 hours to 5:55 pm AST (21:55 UTC). The last one was M 2.1, 9 km (5 mi) WNW, at 4:39 pm AST on 9 November 2026, estimated intensity II (weak) in town. Every earthquake near Tallaboa

This page: a magnitude 2.9 earthquake was recorded 6 km (4 mi) south of Tallaboa, PR, at 4:07 am AST on 31 October 2019 (08:07 UTC), 9.0 km deep.

USGS: 6 km S of Tallaboa, Puerto Rico

11 km (7 mi) SW of Ponce, PR

4:07 am AST, Oct 31, 2019 · · 9.0 km deep · released about 630 lb of TNT

Every earthquake near Tallaboa Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Peñuelas Municipio 10 kmGuayanilla Municipio 12 kmPonce Municipio 13 kmGuánica Municipio 23 kmYauco Municipio 23 kmJuana Díaz Municipio 24 kmAdjuntas Municipio 27 kmSabana Grande Municipio 30 kmVillalba Municipio 33 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
4:07 am AST on 31 October 2019 ()
Where
6 km (4 mi) south of Tallaboa, PR · earthquakes near Tallaboa
Magnitude
M 2.9 (md)
Depth
9.0 km below the surface
Felt
no reports yet
Nearest
Peñuelas Municipio, 10 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2569 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 30 km (19 mi) from the epicentre. In Tallaboa, 6 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: Tallaboa 6 km, intensity III · Magas Arriba 11 km, intensity III · Ponce 12 km, intensity III · Guayanilla 12 km, intensity III · Tallaboa Alta 13 km, intensity III · Yauco 18 km, intensity II · Adjuntas 25 km, intensity II · Río Cañas Abajo 28 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 630 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 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× 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 630 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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 17.9388, -66.7096. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Peñuelas Municipio, PR 10 km (6 mi) NNW earthquakes near Peñuelas Municipio
Guayanilla Municipio, PR 12 km (7 mi) NW earthquakes near Guayanilla Municipio
Ponce Municipio, PR 13 km (8 mi) ENE earthquakes near Ponce Municipio
Guánica Municipio, PR 23 km (14 mi) W earthquakes near Guánica Municipio
Yauco Municipio, PR 23 km (14 mi) NW earthquakes near Yauco Municipio
Juana Díaz Municipio, PR 24 km (15 mi) ENE earthquakes near Juana Díaz Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.0 1 km NE of Hormigueros, Puerto Rico
  2. 1.9 12 km SSE of Ponce, Puerto Rico
  3. 2.0 6 km NNE of Sabana Grande, Puerto Rico
  4. 2.8 37 km SSE of Tallaboa, Puerto Rico
  5. 2.1 8 km SW of La Parguera, Puerto Rico
  6. 2.3 9 km SW of La Parguera, Puerto Rico
  7. 2.1 12 km SSE of Ponce, Puerto Rico
  8. 2.0 9 km SSW of La Parguera, Puerto Rico
  9. 2.2 5 km SW of La Parguera, Puerto Rico
  10. 2.3 9 km SSW of Potala Pastillo, Puerto Rico
  11. 1.9 4 km ENE of Hormigueros, Puerto Rico
  12. 1.8 13 km S of Ponce, Puerto Rico
  13. 1.8 1 km S of Guayanilla, Puerto Rico
  14. 1.9 1 km ENE of Sabana Grande, Puerto Rico
  15. 2.1 0 km NNW of Mariano Colón, 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.