QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Quebradillas, PR

No earthquake was likely felt in Quebradillas in the 24 hours to 7:52 pm AST (23:52 UTC). The last one was M 3.4, 36 km (22 mi) NNW, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Quebradillas

This page: a magnitude 2.5 earthquake was recorded 3 km (2 mi) north-northwest of Quebradillas, PR, at 11:50 pm AST on 10 August 2023 (03:50 UTC), 17 km deep.

USGS: 3 km NNW of Quebradillas, Puerto Rico

94 km (59 mi) W of San Juan, PR · 23 km (15 mi) WNW of Arecibo, PR

11:50 pm AST, Aug 10, 2023 · · 17 km deep · released about 190 lb of TNT

Every earthquake near Quebradillas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Quebradillas Municipio 5 kmIsabela Municipio 7 kmCamuy Municipio 11 kmHatillo Municipio 18 kmSan Sebastián Municipio 19 kmMoca Municipio 19 kmAguadilla Municipio 20 kmLares Municipio 26 kmAguada Municipio 28 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
11:50 pm AST on 10 August 2023 ()
Where
3 km (2 mi) north-northwest of Quebradillas, PR · earthquakes near Quebradillas
Magnitude
M 2.5 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Quebradillas Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1189 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 15 km (9 mi) from the epicentre. In Quebradillas, 3 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: Quebradillas 3 km, intensity II · Isabela 8 km, intensity II · Hatillo 14 km, intensity II · Rafael Hernandez 14 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 80,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 57,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.1× the energy of this one
  4. This earthquake M 2.5 about 190 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 450 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 · 48 km NNW of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 33 km NW of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 47 km WNW of this epicentre
  4. 6.3 6 km WNW of Aguadilla, Puerto Rico · 28 km WSW of this epicentre
  5. 6.1 15 km WNW of San Antonio, Puerto Rico · 30 km W 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 18.5005, -66.9527. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Quebradillas Municipio, PR 5 km (3 mi) SE earthquakes near Quebradillas Municipio
Isabela Municipio, PR 7 km (4 mi) WSW earthquakes near Isabela Municipio
Camuy Municipio, PR 11 km (7 mi) ESE earthquakes near Camuy Municipio
Hatillo Municipio, PR 18 km (11 mi) ESE earthquakes near Hatillo Municipio
San Sebastián Municipio, PR 19 km (12 mi) S earthquakes near San Sebastián Municipio
Moca Municipio, PR 19 km (12 mi) SW earthquakes near Moca Municipio

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

Aftershocks so far

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

  1. 2.9 4 km NW of Maricao, Puerto Rico
  2. 2.5 3 km S of Quebrada, Puerto Rico
  3. 2.4 1 km N of Quebrada, Puerto Rico
  4. 2.7 11 km N of Arecibo, Puerto Rico
  5. 2.8 31 km N of Isabela, Puerto Rico
  6. 3.0 Puerto Rico region
  7. 2.2 Puerto Rico region
  8. 3.1 15 km NNE of Carrizales, Puerto Rico
  9. 3.0 0 km SW of Maricao, Puerto Rico
  10. 2.2 5 km N of Sabana Grande, Puerto Rico
  11. 2.8 5 km NNW of Mayagüez, Puerto Rico
  12. 3.4 48 km N of Hatillo, Puerto Rico
  13. 3.1 18 km NNW of Camuy, Puerto Rico
  14. 3.2 21 km N of Quebradillas, Puerto Rico
  15. 3.8 39 km N of Carrizales, 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.