QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Carrizales, PR

No earthquake was likely felt in Carrizales in the 24 hours to 11:33 am AST (15:33 UTC). The last one was M 3.4, 43 km (27 mi) NW, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Carrizales

This page: a magnitude 2.5 earthquake was recorded 18 km (11 mi) north-northeast of Carrizales, PR, at 9:10 pm AST on 5 April 2018 (01:10 UTC), 14 km deep.

USGS: 17 km NNE of Carrizales, Puerto Rico

77 km (48 mi) WNW of San Juan, PR · 20 km (12 mi) N of Arecibo, PR

9:10 pm AST, Apr 5, 2018 · · 14 km deep · released about 140 lb of TNT

Every earthquake near Carrizales Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hatillo Municipio 22 kmArecibo Municipio 24 kmCamuy Municipio 24 kmQuebradillas Municipio 27 kmBarceloneta Municipio 27 kmIsabela Municipio 33 kmManatí Municipio 34 kmFlorida Municipio 35 kmUtuado Municipio 41 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
9:10 pm AST on 5 April 2018 ()
Where
18 km (11 mi) north-northeast of Carrizales, PR · earthquakes near Carrizales
Magnitude
M 2.5 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Hatillo Municipio, 22 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3141 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 17 km (11 mi) from the epicentre. In Carrizales, 18 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: Arecibo, Hatillo, Camuy, Corcovado, Rafael Gonzalez, Bajadero.

How big was it?

This earthquake released about 140 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 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 75,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.7× the energy of this one
  4. This earthquake M 2.5 about 140 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 4.0 on 2017-03-24 — about 210 times the energy of this one.

Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 49 km NW of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 47 km W of this epicentre
  3. 6.4 61 km N of Hatillo, Puerto Rico · 46 km N of this epicentre
  4. 6.1 18 km NNW of San Antonio, Puerto Rico · 46 km W of this epicentre
  5. 5.8 12 km N of Garrochales, Puerto Rico · 21 km ESE 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 18.6351, -66.7481. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hatillo Municipio, PR 22 km (14 mi) SSW earthquakes near Hatillo Municipio
Arecibo Municipio, PR 24 km (15 mi) SSE earthquakes near Arecibo Municipio
Camuy Municipio, PR 24 km (15 mi) SSW earthquakes near Camuy Municipio
Quebradillas Municipio, PR 27 km (17 mi) SW earthquakes near Quebradillas Municipio
Barceloneta Municipio, PR 27 km (17 mi) SE earthquakes near Barceloneta Municipio
Isabela Municipio, PR 33 km (20 mi) WSW earthquakes near Isabela Municipio

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

Aftershocks so far

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

  1. 1.9 10 km SSE of Lares, Puerto Rico
  2. 2.5 3 km NW of Barahona, Puerto Rico
  3. 2.8 7 km ENE of Arecibo, Puerto Rico
  4. 2.8 2 km NNW of Barceloneta, Puerto Rico
  5. 2.8 12 km N of Quebradillas, Puerto Rico
  6. 2.9 12 km NNE of Isabela, Puerto Rico
  7. 3.1 7 km NNW of Vega Baja, Puerto Rico
  8. 2.8 16 km NNE of Carrizales, Puerto Rico
  9. 2.6 28 km NNW of Tierras Nuevas Poniente, Puerto Rico
  10. 1.9 23 km NNE of Arecibo, Puerto Rico
  11. 2.4 20 km N of Hatillo, Puerto Rico
  12. 2.8 34 km NNW of San Antonio, Puerto Rico
  13. 2.7 15 km NW of San Antonio, Puerto Rico
  14. 2.8 27 km N of Arecibo, Puerto Rico
  15. 1.8 5 km ESE of Las Marías, 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.