QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

Earthquake near Isabela, PR

No earthquake was likely felt in Isabela in the 24 hours to 9:48 pm AST (01:48 UTC). The last one was M 3.4, 31 km (19 mi) N, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Isabela

This page: a magnitude 2.8 earthquake was recorded 28 km (18 mi) north of Isabela, PR, at 7:45 am AST on 24 June 2026 (11:45 UTC), 34 km deep. 1 person has reported feeling it to USGS.

USGS: 28 km N of Isabela, Puerto Rico

47 km (29 mi) NW of Arecibo, PR · 111 km (69 mi) WNW of San Juan, PR

7:45 am AST, Jun 24, 2026 · · 34 km deep · released about 430 lb of TNT

Every earthquake near Isabela Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 30 kmAguadilla Municipio 32 kmQuebradillas Municipio 34 kmCamuy Municipio 39 kmMoca Municipio 42 kmHatillo Municipio 44 kmAguada Municipio 45 kmSan Sebastián Municipio 48 kmRincón Municipio 51 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
7:45 am AST on 24 June 2026 ()
Where
28 km (18 mi) north of Isabela, PR · earthquakes near Isabela
Magnitude
M 2.8 (md)
Depth
34 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Isabela Municipio, 30 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 140 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 it was probably too small to be felt, even directly above it. In Isabela, 28 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.

How big was it?

This earthquake released about 430 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 35,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 25,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.2× the energy of this one
  4. This earthquake M 2.8 about 430 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 6.0 on 2019-09-24 — about 70,000 times the energy of this one.

Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 19 km NNW of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 16 km WSW of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 39 km WSW of this epicentre
  4. 6.4 61 km N of Hatillo, Puerto Rico · 41 km NE of this epicentre
  5. 6.3 6 km WNW of Aguadilla, Puerto Rico · 39 km SSW 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 18.7542, -67.0472. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Isabela Municipio, PR 30 km (19 mi) S earthquakes near Isabela Municipio
Aguadilla Municipio, PR 32 km (20 mi) SSW earthquakes near Aguadilla Municipio
Quebradillas Municipio, PR 34 km (21 mi) SSE earthquakes near Quebradillas Municipio
Camuy Municipio, PR 39 km (24 mi) SSE earthquakes near Camuy Municipio
Moca Municipio, PR 42 km (26 mi) S earthquakes near Moca Municipio
Hatillo Municipio, PR 44 km (27 mi) SE earthquakes near Hatillo Municipio

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

Aftershocks so far

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

  1. 2.8 16 km NNE of Arecibo, Puerto Rico
  2. 2.8 13 km NNE of Carrizales, Puerto Rico
  3. 2.5 11 km N of Quebradillas, Puerto Rico
  4. 3.0 15 km N of Arecibo, Puerto Rico
  5. 3.4 46 km NNW of San Antonio, Puerto Rico
  6. 3.2 27 km N of Isabela, Puerto Rico
  7. 2.8 43 km NNE of Arecibo, Puerto Rico
  8. 4.0 50 km NNW of San Antonio, Puerto Rico
  9. 3.1 47 km NW of San Antonio, Puerto Rico
  10. 3.1 36 km NNE of Arecibo, Puerto Rico
  11. 3.0 38 km NW of San Antonio, Puerto Rico
  12. 3.1 43 km NW of San Antonio, Puerto Rico
  13. 2.4 19 km NNE of Arecibo, Puerto Rico
  14. 3.1 57 km N of Hatillo, Puerto Rico
  15. 3.0 52 km N of Hatillo, 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.