QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Sabana Grande, PR

Yes: an earthquake was likely felt in Sabana Grande in the last 24 hours. M 2.4, 16 km (10 mi) SSE of Sabana Grande, at 3:43 pm AST on 11 November 2026 (19:43 UTC); the estimated shaking in Sabana Grande was intensity II (weak). Every earthquake near Sabana Grande

This page: a magnitude 2.5 earthquake was recorded 4 km (3 mi) northeast of Sabana Grande, PR, at 3:31 am AST on 25 September 2023 (07:31 UTC), 17 km deep.

USGS: 4 km NE of Sabana Grande, Puerto Rico

34 km (21 mi) WNW of Ponce, PR · 25 km (16 mi) ESE of Mayagüez, PR

3:31 am AST, Sep 25, 2023 · · 17 km deep · released about 150 lb of TNT

Every earthquake near Sabana Grande Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sabana Grande Municipio 3 kmYauco Municipio 8 kmMaricao Municipio 8 kmSan Germán Municipio 12 kmLas Marías Municipio 15 kmGuánica Municipio 17 kmGuayanilla Municipio 17 kmLajas Municipio 18 kmAdjuntas Municipio 20 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
3:31 am AST on 25 September 2023 ()
Where
4 km (3 mi) northeast of Sabana Grande, PR · earthquakes near Sabana Grande
Magnitude
M 2.5 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 3 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1144 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 13 km (8 mi) from the epicentre. In Sabana Grande, 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 11 km, intensity II · 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 150 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 5.8 100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 72,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.5× the energy of this one
  4. This earthquake M 2.5 about 150 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 810,000 times the energy of this one.

Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 49 km NW of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 37 km NNW of this epicentre
  3. 5.2 19 km SW of Stella, Puerto Rico · 48 km WNW of this epicentre
  4. 5.1 21 km SW of Stella, Puerto Rico · 47 km W 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 18.0993, -66.9283. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Sabana Grande Municipio, PR 3 km (2 mi) SW earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 8 km (5 mi) ESE earthquakes near Yauco Municipio
Maricao Municipio, PR 8 km (5 mi) N earthquakes near Maricao Municipio
San Germán Municipio, PR 12 km (7 mi) W earthquakes near San Germán Municipio
Las Marías Municipio, PR 15 km (9 mi) NNW earthquakes near Las Marías Municipio
Guánica Municipio, PR 17 km (10 mi) S earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 2.4 7 km SE of Maria Antonia, Puerto Rico
  2. 2.8 8 km SSE of Maria Antonia, Puerto Rico
  3. 2.5 7 km SW of Guánica, Puerto Rico
  4. 2.2 3 km S of Maria Antonia, Puerto Rico
  5. 2.7 Puerto Rico region
  6. 2.1 5 km SE of Maria Antonia, Puerto Rico
  7. 2.2 Puerto Rico region
  8. 2.8 2 km ESE of Palomas, Puerto Rico
  9. 2.7 7 km SSE of Maria Antonia, Puerto Rico
  10. 2.9 9 km SSE of Maria Antonia, Puerto Rico
  11. 2.7 7 km SSE of Maria Antonia, Puerto Rico
  12. 2.0 10 km SSE of Maria Antonia, Puerto Rico
  13. 3.2 10 km SSE of Maria Antonia, Puerto Rico
  14. 2.3 Puerto Rico region
  15. 2.3 7 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.