QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Isabela, PR

No earthquake was likely felt in Isabela in the 24 hours to 10:46 am AST (14:46 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 2.4 earthquake was recorded 22 km (14 mi) north-northwest of Isabela, PR, at 2:29 pm AST on 18 February 2019 (18:29 UTC), 11 km deep.

USGS: 22 km NNW of Isabela, Puerto Rico

44 km (28 mi) NW of Arecibo, PR · 111 km (69 mi) WNW of San Juan, PR

2:29 pm AST, Feb 18, 2019 · · 11 km deep · released about 130 lb of TNT

Every earthquake near Isabela Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 25 kmAguadilla Municipio 26 kmQuebradillas Municipio 30 kmCamuy Municipio 36 kmMoca Municipio 36 kmAguada Municipio 38 kmHatillo Municipio 40 kmSan Sebastián Municipio 42 kmRincón Municipio 44 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
2:29 pm AST on 18 February 2019 ()
Where
22 km (14 mi) north-northwest of Isabela, PR · earthquakes near Isabela
Magnitude
M 2.4 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 25 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2823 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 18 km (11 mi) from the epicentre. In Isabela, 22 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.

Earthquakes near other towns within 30 km: Rafael Hernandez, Mora, Aceitunas, Quebradillas, Caban.

How big was it?

This earthquake released about 130 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 80,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.2× the energy of this one
  4. This earthquake M 2.4 about 130 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 4.3 on 2017-10-14 — about 640 times the energy of this one.

Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 24 km NNW of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 13 km W of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 35 km WSW of this epicentre
  4. 6.4 61 km N of Hatillo, Puerto Rico · 47 km NE of this epicentre
  5. 6.3 6 km WNW of Aguadilla, Puerto Rico · 33 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 18.6988, -67.0681. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Isabela Municipio, PR 25 km (15 mi) SSE earthquakes near Isabela Municipio
Aguadilla Municipio, PR 26 km (16 mi) SSW earthquakes near Aguadilla Municipio
Quebradillas Municipio, PR 30 km (19 mi) SSE earthquakes near Quebradillas Municipio
Camuy Municipio, PR 36 km (22 mi) SE earthquakes near Camuy Municipio
Moca Municipio, PR 36 km (22 mi) S earthquakes near Moca Municipio
Aguada Municipio, PR 38 km (24 mi) SSW earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 1.7 10 km NNE of Carrizales, Puerto Rico
  2. 2.1 45 km N of Isabela, Puerto Rico
  3. 2.1 44 km N of Isabela, Puerto Rico
  4. 2.6 46 km N of Isabela, Puerto Rico
  5. 2.1 46 km N of Isabela, Puerto Rico
  6. 2.6 46 km NNE of Isabela, Puerto Rico
  7. 2.0 38 km NW of Rincón, Puerto Rico
  8. 2.4 3 km NW of Aguadilla, Puerto Rico
  9. 2.1 28 km WNW of Aguadilla, Puerto Rico
  10. 2.5 11 km N of Arecibo, Puerto Rico
  11. 2.8 58 km NW of San Antonio, Puerto Rico
  12. 2.1 1 km SE of Espino, Puerto Rico
  13. 2.8 30 km NNE of Carrizales, Puerto Rico
  14. 2.7 13 km NNW of Rincón, Puerto Rico
  15. 2.8 56 km NW of San Antonio, 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.