QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

Earthquake near Santa Isabel, PR

No earthquake was likely felt in Santa Isabel in the 24 hours to 12:54 pm AST (16:54 UTC). The last one was M 2.2, 9 km (6 mi) NE, at 5:05 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Santa Isabel

This page: a magnitude 2.6 earthquake was recorded 10 km (6 mi) south of Santa Isabel, PR, at 3:38 am AST on 20 September 2025 (07:38 UTC), 6.3 km deep.

USGS: 10 km S of Santa Isabel, Puerto Rico

28 km (17 mi) ESE of Ponce, PR

3:38 am AST, Sep 20, 2025 · · 6.3 km deep · released about 270 lb of TNT

Every earthquake near Santa Isabel Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Isabel Municipio 9 kmJuana Díaz Municipio 17 kmSalinas Municipio 18 kmCoamo Municipio 26 kmPonce Municipio 26 kmVillalba Municipio 30 kmGuayama Municipio 30 kmAibonito Municipio 32 kmCayey Municipio 37 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
3:38 am AST on 20 September 2025 ()
Where
10 km (6 mi) south of Santa Isabel, PR · earthquakes near Santa Isabel
Magnitude
M 2.6 (md)
Depth
6.3 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 9 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 417 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 23 km (14 mi) from the epicentre. In Santa Isabel, 10 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: Santa Isabel 10 km, intensity III · Río Cañas Abajo 20 km, intensity II · Coamo 23 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 270 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 57,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 40,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.6× the energy of this one
  4. This earthquake M 2.6 about 270 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 450,000 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 17.8727, -66.4000. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Santa Isabel Municipio, PR 9 km (6 mi) N earthquakes near Santa Isabel Municipio
Juana Díaz Municipio, PR 17 km (11 mi) NW earthquakes near Juana Díaz Municipio
Salinas Municipio, PR 18 km (11 mi) NE earthquakes near Salinas Municipio
Coamo Municipio, PR 26 km (16 mi) N earthquakes near Coamo Municipio
Ponce Municipio, PR 26 km (16 mi) WNW earthquakes near Ponce Municipio
Villalba Municipio, PR 30 km (18 mi) NNW earthquakes near Villalba Municipio

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

Aftershocks so far

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

  1. 2.1 2 km SSE of Indios, Puerto Rico
  2. 2.5 29 km S of Arroyo, Puerto Rico
  3. 2.5 2 km WSW of Indios, Puerto Rico
  4. 2.5 15 km SSE of Guánica, Puerto Rico
  5. 2.3 3 km SSE of Indios, Puerto Rico
  6. 2.3 18 km SSE of Guánica, Puerto Rico
  7. 2.1 10 km SSE of Maria Antonia, Puerto Rico
  8. 1.9 2 km WSW of Indios, Puerto Rico
  9. 2.6 14 km SSE of Guánica, Puerto Rico
  10. 2.4 3 km W of Indios, Puerto Rico
  11. 2.4 2 km SSW of Indios, Puerto Rico
  12. 2.4 16 km SSE of Guánica, Puerto Rico
  13. 2.2 11 km SSE of Maria Antonia, Puerto Rico
  14. 2.5 18 km SSE of Guánica, Puerto Rico
  15. 1.5 1 km SE of Salinas, 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.