QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Liborio Negron Torres, PR

Yes: an earthquake was likely felt in Liborio Negron Torres in the last 24 hours. M 2.4, 12 km (7 mi) S of Liborio Negron Torres, at 3:43 pm AST on 11 November 2026 (19:43 UTC); the estimated shaking in Liborio Negron Torres was intensity II (weak). Every earthquake near Liborio Negron Torres

This page: a magnitude 2.5 earthquake was recorded 4 km (3 mi) north-northeast of Liborio Negron Torres, PR, at 3:42 am AST on 28 September 2023 (07:42 UTC), 16 km deep.

USGS: 4 km NNE of Liborio Negron Torres, Puerto Rico

33 km (20 mi) WNW of Ponce, PR · 27 km (17 mi) ESE of Mayagüez, PR

3:42 am AST, Sep 28, 2023 · · 16 km deep · released about 180 lb of TNT

Every earthquake near Liborio Negron Torres Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sabana Grande Municipio 3 kmYauco Municipio 7 kmMaricao Municipio 11 kmSan Germán Municipio 13 kmGuánica Municipio 14 kmGuayanilla Municipio 15 kmLajas Municipio 16 kmLas Marías Municipio 18 kmAdjuntas Municipio 21 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
3:42 am AST on 28 September 2023 ()
Where
4 km (3 mi) north-northeast of Liborio Negron Torres, PR · earthquakes near Liborio Negron Torres
Magnitude
M 2.5 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 3 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1141 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 15 km (9 mi) from the epicentre. In Liborio Negron Torres, 4 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 9 km, intensity II · San Germán 13 km, intensity II · Guayanilla 15 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 86,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 61,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.4× the energy of this one
  4. This earthquake M 2.5 about 180 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 680,000 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 5.8 4 km E of Moca, Puerto Rico · 40 km NNW of this epicentre
  2. 5.2 19 km SW of Stella, Puerto Rico · 49 km WNW of this epicentre
  3. 5.1 21 km SW of Stella, Puerto Rico · 49 km WNW of this epicentre

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 18.0738, -66.9212. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Sabana Grande Municipio, PR 3 km (2 mi) WNW earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 7 km (4 mi) E earthquakes near Yauco Municipio
Maricao Municipio, PR 11 km (7 mi) N earthquakes near Maricao Municipio
San Germán Municipio, PR 13 km (8 mi) WNW earthquakes near San Germán Municipio
Guánica Municipio, PR 14 km (9 mi) S earthquakes near Guánica Municipio
Guayanilla Municipio, PR 15 km (9 mi) ESE 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. 2.4 8 km SE of Maria Antonia, Puerto Rico
  2. 2.5 11 km SSE of Maria Antonia, Puerto Rico
  3. 2.3 5 km SW of Guánica, Puerto Rico
  4. 2.5 2 km S of Magas Arriba, Puerto Rico
  5. 2.5 7 km SSE of Maria Antonia, Puerto Rico
  6. 2.2 4 km WSW of Tallaboa, Puerto Rico
  7. 2.3 9 km SSE of Maria Antonia, Puerto Rico
  8. 2.1 8 km SSE of Maria Antonia, Puerto Rico
  9. 2.8 9 km SSE of Maria Antonia, Puerto Rico
  10. 2.2 Puerto Rico region
  11. 3.3 6 km SE of Maria Antonia, Puerto Rico
  12. 2.3 10 km SSE of Maria Antonia, Puerto Rico
  13. 2.8 8 km SE of Maria Antonia, Puerto Rico
  14. 2.4 9 km SSE of Maria Antonia, Puerto Rico
  15. 2.8 9 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.