QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

Earthquake near Aguadilla, PR

No earthquake was likely felt in Aguadilla in the 24 hours to 5:24 pm AST (21:24 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 2.2 earthquake was recorded 28 km (17 mi) west-northwest of Aguadilla, PR, at 10:49 pm AST on 25 September 2018 (02:49 UTC), 10 km deep.

USGS: 27 km WNW of Aguadilla, Puerto Rico

47 km (29 mi) NNW of Mayagüez, PR · 139 km (87 mi) W of San Juan, PR

10:49 pm AST, Sep 25, 2018 · · 10 km deep · released about 69 lb of TNT

Every earthquake near Aguadilla Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 26 kmRincón Municipio 28 kmAguada Municipio 29 kmMoca Municipio 37 kmIsabela Municipio 39 kmAñasco Municipio 40 kmQuebradillas Municipio 48 kmSan Sebastián Municipio 50 kmHormigueros Municipio 55 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
10:49 pm AST on 25 September 2018 ()
Where
28 km (17 mi) west-northwest of Aguadilla, PR · earthquakes near Aguadilla
Magnitude
M 2.2 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 26 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2969 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 16 km (10 mi) from the epicentre. In Aguadilla, 28 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: Rincón, Aguada, Caban, Stella.

How big was it?

This earthquake released about 69 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 220,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 150,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 69 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 1,700 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 · 47 km NE of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 25 km NE of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 6 km N of this epicentre
  4. 6.3 6 km WNW of Aguadilla, Puerto Rico · 21 km SE of this epicentre
  5. 6.1 15 km WNW of San Antonio, Puerto Rico · 15 km E 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 18.5588, -67.3751. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguadilla Municipio, PR 26 km (16 mi) ESE earthquakes near Aguadilla Municipio
Rincón Municipio, PR 28 km (17 mi) SSE earthquakes near Rincón Municipio
Aguada Municipio, PR 29 km (18 mi) SE earthquakes near Aguada Municipio
Moca Municipio, PR 37 km (23 mi) ESE earthquakes near Moca Municipio
Isabela Municipio, PR 39 km (24 mi) ESE earthquakes near Isabela Municipio
Añasco Municipio, PR 40 km (25 mi) SE earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 2.8 10 km NW of Puerto Real, Puerto Rico
  2. 1.7 9 km NW of Puerto Real, Puerto Rico
  3. 1.9 9 km NW of Puerto Real, Puerto Rico
  4. 2.8 10 km NW of Puerto Real, Puerto Rico
  5. 2.5 3 km E of Moca, Puerto Rico
  6. 2.3 23 km NNE of Isabela, Puerto Rico
  7. 1.8 20 km SW of Stella, Puerto Rico
  8. 2.4 51 km NW of San Antonio, Puerto Rico
  9. 2.8 54 km NW of San Antonio, Puerto Rico
  10. 3.3 29 km WNW of Puerto Real, Puerto Rico
  11. 2.5 42 km NW of Rincón, Puerto Rico
  12. 2.3 25 km NW of Rincón, Puerto Rico
  13. 2.6 33 km NW of San Antonio, Puerto Rico
  14. 2.0 3 km WNW of Mayagüez, Puerto Rico
  15. 2.3 3 km NNE of Espino, 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.