QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

Earthquake near Aguadilla, PR

No earthquake was likely felt in Aguadilla in the 24 hours to 10:47 am AST (14:47 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 2.6 earthquake was recorded 20 km (13 mi) north of Aguadilla, PR, at 3:11 am AST on 4 January 2020 (07:11 UTC), 14 km deep.

USGS: 15 km NNW of San Antonio, Puerto Rico

45 km (28 mi) N of Mayagüez, PR · 119 km (74 mi) W of San Juan, PR

3:11 am AST, Jan 4, 2020 · · 14 km deep · released about 280 lb of TNT

Every earthquake near Aguadilla Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 15 kmIsabela Municipio 22 kmAguada Municipio 26 kmMoca Municipio 28 kmQuebradillas Municipio 30 kmRincón Municipio 31 kmAñasco Municipio 36 kmCamuy Municipio 37 kmSan Sebastián Municipio 38 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
3:11 am AST on 4 January 2020 ()
Where
20 km (13 mi) north of Aguadilla, PR · earthquakes near Aguadilla
Magnitude
M 2.6 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 15 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2462 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 20 km (12 mi) from the epicentre. In Aguadilla, 20 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: Rafael Hernandez 18 km, intensity II · Isabela 20 km, intensity II · Aguadilla 20 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 280 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 53,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 38,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.3× the energy of this one
  4. This earthquake M 2.6 about 280 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 5.1 on 2019-09-24 — about 4,100 times the energy of this one.

Before 2016, the USGS record lists 11 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 34 km N of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 10 km N of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 22 km W of this epicentre
  4. 6.3 6 km WNW of Aguadilla, Puerto Rico · 19 km SSW of this epicentre
  5. 6.1 15 km WNW of San Antonio, Puerto Rico · 9 km SW 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 18.6088, -67.1741. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguadilla Municipio, PR 15 km (9 mi) SSE earthquakes near Aguadilla Municipio
Isabela Municipio, PR 22 km (14 mi) SE earthquakes near Isabela Municipio
Aguada Municipio, PR 26 km (16 mi) S earthquakes near Aguada Municipio
Moca Municipio, PR 28 km (17 mi) SSE earthquakes near Moca Municipio
Quebradillas Municipio, PR 30 km (19 mi) ESE earthquakes near Quebradillas Municipio
Rincón Municipio, PR 31 km (19 mi) SSW earthquakes near Rincón Municipio

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

Aftershocks so far

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

  1. 3.0 43 km NW of Rincón, Puerto Rico
  2. 2.5 63 km N of San Antonio, Puerto Rico
  3. 2.5 42 km NNW of San Antonio, Puerto Rico
  4. 1.9 Puerto Rico region
  5. 3.1 37 km NW of Rincón, Puerto Rico
  6. 2.6 1 km SSW of Mayagüez, Puerto Rico
  7. 2.0 6 km WNW of Mayagüez, Puerto Rico
  8. 2.8 54 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.