QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

Earthquake near Aguadilla, PR

No earthquake was likely felt in Aguadilla in the 24 hours to 10:53 am AST (14:53 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 2.8 earthquake was recorded 41 km (26 mi) north of Aguadilla, PR, at 5:01 pm AST on 15 April 2018 (21:01 UTC), 19 km deep.

USGS: 34 km NNW of San Antonio, Puerto Rico

5:01 pm AST, Apr 15, 2018 · · 19 km deep · released about 510 lb of TNT

Every earthquake near Aguadilla Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 35 kmIsabela Municipio 39 kmQuebradillas Municipio 45 kmAguada Municipio 47 kmMoca Municipio 48 kmRincón Municipio 51 kmCamuy Municipio 52 kmSan Sebastián Municipio 56 kmHatillo Municipio 57 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
5:01 pm AST on 15 April 2018 ()
Where
41 km (26 mi) north of Aguadilla, PR · earthquakes near Aguadilla
Magnitude
M 2.8 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 35 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3132 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 21 km (13 mi) from the epicentre. In Aguadilla, 41 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 510 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 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 170 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 · 14 km NNE of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 11 km S of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 29 km SW of this epicentre
  4. 6.4 61 km N of Hatillo, Puerto Rico · 48 km NE of this epicentre
  5. 6.3 6 km WNW of Aguadilla, Puerto Rico · 40 km S 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 18.7955, -67.1841. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguadilla Municipio, PR 35 km (22 mi) S earthquakes near Aguadilla Municipio
Isabela Municipio, PR 39 km (24 mi) SSE earthquakes near Isabela Municipio
Quebradillas Municipio, PR 45 km (28 mi) SE earthquakes near Quebradillas Municipio
Aguada Municipio, PR 47 km (29 mi) S earthquakes near Aguada Municipio
Moca Municipio, PR 48 km (30 mi) SSE earthquakes near Moca Municipio
Rincón Municipio, PR 51 km (32 mi) S earthquakes near Rincón Municipio

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

Aftershocks so far

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

  1. 2.6 29 km N of Hatillo, Puerto Rico
  2. 2.7 74 km NW of San Antonio, Puerto Rico
  3. 2.0 Mona Passage
  4. 2.9 58 km NNW of San Antonio, Puerto Rico
  5. 2.2 29 km NW of San Antonio, Puerto Rico
  6. 1.6 20 km N of Hatillo, Puerto Rico
  7. 2.4 14 km NNW of Isabela, Puerto Rico
  8. 2.0 36 km NW of Rincón, Puerto Rico
  9. 2.9 76 km NW of San Antonio, Puerto Rico
  10. 2.8 61 km N of Isabela, Puerto Rico
  11. 3.0 25 km NW of Rincón, Puerto Rico
  12. 3.1 Mona Passage
  13. 2.8 61 km N of Hatillo, Puerto Rico
  14. 3.4 65 km NW of San Antonio, Puerto Rico
  15. 1.6 36 km N 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.