QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near Aguadilla, PR

No earthquake was likely felt in Aguadilla in the 24 hours to 5:20 pm AST (21:20 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 2.7 earthquake was recorded 44 km (28 mi) northwest of Aguadilla, PR, at 10:31 pm AST on 13 September 2018 (02:31 UTC), 39 km deep.

USGS: 44 km NW of Aguadilla, Puerto Rico

10:31 pm AST, Sep 13, 2018 · · 39 km deep · released about 320 lb of TNT

Every earthquake near Aguadilla Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 42 kmRincón Municipio 45 kmAguada Municipio 46 kmIsabela Municipio 54 kmMoca Municipio 54 kmAñasco Municipio 57 kmQuebradillas Municipio 63 kmSan Sebastián Municipio 67 kmCamuy Municipio 70 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
10:31 pm AST on 13 September 2018 ()
Where
44 km (28 mi) northwest of Aguadilla, PR · earthquakes near Aguadilla
Magnitude
M 2.7 (md)
Depth
39 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 42 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2981 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 Aguadilla, 44 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 320 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 48,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 34,000× the energy of this one
  3. Around the size people start to feel M 3.0 3× the energy of this one
  4. This earthquake M 2.7 about 320 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 4.4 on 2017-10-01 — about 380 times the energy of this one.

Before 2016, the USGS record lists 13 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 46 km ENE of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 31 km E of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 12 km SE of this epicentre
  4. 6.3 6 km WNW of Aguadilla, Puerto Rico · 39 km SE of this epicentre
  5. 6.3 58 km E of Punta Cana, Dominican Republic · 44 km WSW 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 18.6795, -67.4818. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguadilla Municipio, PR 42 km (26 mi) ESE earthquakes near Aguadilla Municipio
Rincón Municipio, PR 45 km (28 mi) SSE earthquakes near Rincón Municipio
Aguada Municipio, PR 46 km (29 mi) SE earthquakes near Aguada Municipio
Isabela Municipio, PR 54 km (33 mi) ESE earthquakes near Isabela Municipio
Moca Municipio, PR 54 km (34 mi) SE earthquakes near Moca Municipio
Añasco Municipio, PR 57 km (36 mi) SE earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 2.4 43 km N of San Antonio, Puerto Rico
  2. 2.8 42 km NNW of San Antonio, Puerto Rico
  3. 2.4 23 km NW of Rincón, Puerto Rico
  4. 2.5 31 km NNW of San Antonio, Puerto Rico
  5. 2.4 24 km N of Isabela, Puerto Rico
  6. 2.7 22 km W of Rincón, Puerto Rico
  7. 2.8 35 km N of San Antonio, Puerto Rico
  8. 3.2 78 km NW of San Antonio, Puerto Rico
  9. 2.2 2 km NW of Moca, Puerto Rico
  10. 2.9 47 km NNW of San Antonio, Puerto Rico
  11. 2.8 3 km N of Rincón, Puerto Rico
  12. 2.9 58 km NNW of San Antonio, Puerto Rico
  13. 2.8 89 km NW of San Antonio, Puerto Rico
  14. 2.2 9 km WNW of Rincón, Puerto Rico
  15. 2.8 43 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.