QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

Earthquake near Santa Isabel, PR

No earthquake was likely felt in Santa Isabel in the 24 hours to 10:40 am AST (14:40 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 1.9 earthquake was recorded 2 km (1 mi) north of Santa Isabel, PR, at 1:09 am AST on 26 April 2026 (05:09 UTC), 8.5 km deep.

USGS: 2 km N of Santa Isabel, Puerto Rico

23 km (15 mi) E of Ponce, PR

1:09 am AST, Apr 26, 2026 · · 8.5 km deep · released about 22 lb of TNT

Every earthquake near Santa Isabel Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Isabel Municipio 4 kmJuana Díaz Municipio 9 kmCoamo Municipio 14 kmSalinas Municipio 15 kmVillalba Municipio 18 kmPonce Municipio 22 kmAibonito Municipio 22 kmBarranquitas Municipio 26 kmOrocovis Municipio 26 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
1:09 am AST on 26 April 2026 ()
Where
2 km (1 mi) north of Santa Isabel, PR · earthquakes near Santa Isabel
Magnitude
M 1.9 (md)
Depth
8.5 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 4 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 199 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 12 km (7 mi) from the epicentre. In Santa Isabel, 2 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: Santa Isabel 2 km, intensity II · Río Cañas Abajo 9 km, intensity II · Coamo 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 22 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 680,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 480,000× the energy of this one
  3. Around the size people start to feel M 3.0 43× the energy of this one
  4. This earthquake M 1.9 about 22 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 5,400,000 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 42 km NE 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 17.9853, -66.4025. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Santa Isabel Municipio, PR 4 km (2 mi) SSE earthquakes near Santa Isabel Municipio
Juana Díaz Municipio, PR 9 km (6 mi) W earthquakes near Juana Díaz Municipio
Coamo Municipio, PR 14 km (9 mi) NNE earthquakes near Coamo Municipio
Salinas Municipio, PR 15 km (9 mi) E earthquakes near Salinas Municipio
Villalba Municipio, PR 18 km (11 mi) NNW earthquakes near Villalba Municipio
Ponce Municipio, PR 22 km (13 mi) W earthquakes near Ponce Municipio

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

Aftershocks so far

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

  1. 2.9 2 km ENE of Magas Arriba, Puerto Rico
  2. 2.2 5 km SE of Maria Antonia, Puerto Rico
  3. 2.4 4 km NNE of Ponce, Puerto Rico
  4. 2.1 7 km WSW of Naranjito, Puerto Rico
  5. 2.6 1 km ESE of Indios, Puerto Rico
  6. 3.2 1 km ENE of Indios, Puerto Rico
  7. 2.3 8 km SSE of Maria Antonia, Puerto Rico
  8. 2.3 2 km NNW of Tallaboa, Puerto Rico
  9. 2.3 2 km SSW of Peñuelas, Puerto Rico
  10. 1.9 Puerto Rico region
  11. 2.1 11 km SSE of Maria Antonia, Puerto Rico
  12. 2.3 1 km SW of Indios, Puerto Rico
  13. 2.0 1 km NNW of Tallaboa, Puerto Rico
  14. 2.1 5 km SSW of Indios, Puerto Rico
  15. 1.9 10 km WNW of Adjuntas, 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.