QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near Isabela, PR

No earthquake was likely felt in Isabela in the 24 hours to 7:59 pm AST (23:59 UTC). The last one was M 3.4, 31 km (19 mi) N, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Isabela

This page: a magnitude 2.7 earthquake was recorded 14 km (9 mi) northwest of Isabela, PR, at 2:15 am AST on 13 June 2017 (06:15 UTC), 75 km deep.

USGS: 10 km NNW of San Antonio, Puerto Rico

42 km (26 mi) N of Mayagüez, PR · 114 km (71 mi) W of San Juan, PR

2:15 am AST, Jun 13, 2017 · · 75 km deep · released about 320 lb of TNT

Every earthquake near Isabela Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 11 kmIsabela Municipio 16 kmMoca Municipio 23 kmAguada Municipio 23 kmQuebradillas Municipio 25 kmRincón Municipio 30 kmCamuy Municipio 32 kmSan Sebastián Municipio 32 kmAñasco Municipio 32 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
2:15 am AST on 13 June 2017 ()
Where
14 km (9 mi) northwest of Isabela, PR · earthquakes near Isabela
Magnitude
M 2.7 (md)
Depth
75 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 11 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3438 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 Isabela, 14 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: Rafael Hernandez, Caban, Mora, Aceitunas, Aguadilla, Moca.

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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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 · 37 km N of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 15 km NNW of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 27 km W of this epicentre
  4. 6.3 6 km WNW of Aguadilla, Puerto Rico · 18 km SSW of this epicentre
  5. 6.1 15 km WNW of San Antonio, Puerto Rico · 11 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 18.5788, -67.1303. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguadilla Municipio, PR 11 km (7 mi) S earthquakes near Aguadilla Municipio
Isabela Municipio, PR 16 km (10 mi) SE earthquakes near Isabela Municipio
Moca Municipio, PR 23 km (14 mi) SSE earthquakes near Moca Municipio
Aguada Municipio, PR 23 km (14 mi) SSW earthquakes near Aguada Municipio
Quebradillas Municipio, PR 25 km (15 mi) ESE earthquakes near Quebradillas Municipio
Rincón Municipio, PR 30 km (18 mi) SSW earthquakes near Rincón 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. 2.9 5 km N of Carrizales, Puerto Rico
  2. 2.4 6 km SW of La Playa, Puerto Rico
  3. 2.7 12 km NNE of Arecibo, Puerto Rico
  4. 3.0 58 km NNW of San Antonio, Puerto Rico
  5. 3.2 2 km S of La Playa, Puerto Rico
  6. 1.8 3 km SSE of Mayagüez, Puerto Rico
  7. 2.4 3 km NE of Mayagüez, Puerto Rico
  8. 2.3 41 km NNW of San Antonio, Puerto Rico
  9. 3.1 48 km NNW of San Antonio, Puerto Rico
  10. 2.6 4 km SW of Maricao, Puerto Rico
  11. 2.7 3 km SW of Maricao, Puerto Rico
  12. 2.1 32 km WNW of Rincón, Puerto Rico
  13. 3.0 12 km NNE of Isabela, Puerto Rico
  14. 2.8 17 km N of Carrizales, Puerto Rico
  15. 2.3 2 km NE of Hormigueros, 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.