QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

Earthquake near Aguadilla, PR

No earthquake was likely felt in Aguadilla in the 24 hours to 4:45 pm AST (20:45 UTC). The last one was M 3.5, 4 km (3 mi) SE, at 12:03 am AST on 6 November 2026, estimated intensity II (weak) in town. Every earthquake near Aguadilla

This page: a magnitude 3.1 earthquake was recorded 31 km (19 mi) northwest of Aguadilla, PR, at 11:54 am AST on 4 February 2024 (15:54 UTC), 13 km deep.

USGS: 30 km NW of Aguadilla, Puerto Rico

50 km (31 mi) NNW of Mayagüez, PR · 142 km (88 mi) W of San Juan, PR

11:54 am AST, Feb 4, 2024 · · 13 km deep · released about 1,300 lb of TNT

Every earthquake near Aguadilla Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 29 kmRincón Municipio 31 kmAguada Municipio 32 kmMoca Municipio 40 kmIsabela Municipio 41 kmAñasco Municipio 43 kmQuebradillas Municipio 51 kmSan Sebastián Municipio 53 kmCamuy Municipio 58 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
11:54 am AST on 4 February 2024 ()
Where
31 km (19 mi) northwest of Aguadilla, PR · earthquakes near Aguadilla
Magnitude
M 3.1 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 29 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1011 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 40 km (25 mi) from the epicentre. In Aguadilla, 31 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: Aguadilla 31 km, intensity II · Rincón 31 km, intensity II · Aguada 32 km, intensity II · Rafael Hernandez 35 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 4.8 on 2019-11-29 — about 330 times the energy of this one.

Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 46 km NE of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 25 km ENE of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 3 km NNE of this epicentre
  4. 6.3 6 km WNW of Aguadilla, Puerto Rico · 25 km SE of this epicentre
  5. 6.1 15 km WNW of San Antonio, Puerto Rico · 17 km ESE 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 18.5875, -67.3920. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguadilla Municipio, PR 29 km (18 mi) ESE earthquakes near Aguadilla Municipio
Rincón Municipio, PR 31 km (20 mi) SSE earthquakes near Rincón Municipio
Aguada Municipio, PR 32 km (20 mi) SE earthquakes near Aguada Municipio
Moca Municipio, PR 40 km (25 mi) SE earthquakes near Moca Municipio
Isabela Municipio, PR 41 km (26 mi) ESE earthquakes near Isabela Municipio
Añasco Municipio, PR 43 km (27 mi) SE earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 3.3 36 km N of Isabela, Puerto Rico
  2. 2.9 6 km W of Mayagüez, Puerto Rico
  3. 2.5 5 km NE of Mayagüez, Puerto Rico
  4. 3.1 13 km N of San Antonio, Puerto Rico
  5. 3.3 10 km SW of Stella, Puerto Rico
  6. 3.1 41 km NW of Rincón, Puerto Rico
  7. 3.1 8 km SSW of La Playa, Puerto Rico
  8. 3.2 54 km NW of San Antonio, Puerto Rico
  9. 2.6 12 km W of Mayagüez, Puerto Rico
  10. 3.0 24 km NW of Rincón, Puerto Rico
  11. 3.0 30 km NW of Aguadilla, Puerto Rico
  12. 3.1 52 km NW of San Antonio, Puerto Rico
  13. 3.1 3 km NNE of Mayagüez, Puerto Rico
  14. 3.2 46 km NW of San Antonio, Puerto Rico
  15. 3.3 61 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.