QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

Earthquake near Carrizales, PR

No earthquake was likely felt in Carrizales in the 24 hours to 1:12 pm AST (17:12 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 3.3 earthquake was recorded 11 km (7 mi) north-northeast of Carrizales, PR, at 11:22 am AST on 24 February 2024 (15:22 UTC), 9.7 km deep.

USGS: 10 km NNE of Carrizales, Puerto Rico

13 km (8 mi) N of Arecibo, PR · 75 km (46 mi) WNW of San Juan, PR

11:22 am AST, Feb 24, 2024 · · 9.7 km deep · released about 1.2 tons of TNT

Every earthquake near Carrizales Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hatillo Municipio 15 kmArecibo Municipio 17 kmCamuy Municipio 18 kmQuebradillas Municipio 22 kmBarceloneta Municipio 23 kmIsabela Municipio 30 kmFlorida Municipio 30 kmManatí Municipio 30 kmUtuado Municipio 34 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
11:22 am AST on 24 February 2024 ()
Where
11 km (7 mi) north-northeast of Carrizales, PR · earthquakes near Carrizales
Magnitude
M 3.3 (md)
Depth
9.7 km below the surface
Felt
no reports yet
Nearest
Hatillo Municipio, 15 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 991 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 49 km (30 mi) from the epicentre. In Carrizales, 11 km away, the estimate is intensity III (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: Arecibo 11 km, intensity III · Hatillo 12 km, intensity III · Quebradillas 23 km, intensity II · Barceloneta 26 km, intensity II · Isabela 30 km, intensity II · Lares 33 km, intensity II · San Sebastián 36 km, intensity II · Rafael Hernandez 37 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× more

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 2018-12-09 — about 51 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.1 24 km NNW of San Antonio, Puerto Rico · 49 km WNW of this epicentre
  2. 6.1 18 km NNW of San Antonio, Puerto Rico · 46 km W of this epicentre
  3. 5.8 12 km N of Garrochales, Puerto Rico · 19 km E of this epicentre
  4. 5.8 4 km E of Moca, Puerto Rico · 39 km WSW of this epicentre
  5. 5.3 28 km NNW of San Antonio, Puerto Rico · 48 km WNW 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 18.5700, -66.7487. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hatillo Municipio, PR 15 km (9 mi) SSW earthquakes near Hatillo Municipio
Arecibo Municipio, PR 17 km (11 mi) SSE earthquakes near Arecibo Municipio
Camuy Municipio, PR 18 km (11 mi) SW earthquakes near Camuy Municipio
Quebradillas Municipio, PR 22 km (14 mi) WSW earthquakes near Quebradillas Municipio
Barceloneta Municipio, PR 23 km (14 mi) ESE earthquakes near Barceloneta Municipio
Isabela Municipio, PR 30 km (18 mi) WSW earthquakes near Isabela Municipio

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

Aftershocks so far

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

  1. 3.9 2 km SSW of Utuado, Puerto Rico
  2. 3.0 14 km N of Hatillo, Puerto Rico
  3. 2.7 4 km NW of Orocovis, Puerto Rico
  4. 2.4 10 km N of Arecibo, Puerto Rico
  5. 3.0 7 km NW of Caban, Puerto Rico
  6. 2.7 16 km NNE of Isabela, Puerto Rico
  7. 2.1 7 km WSW of Adjuntas, Puerto Rico
  8. 3.0 7 km NNE of Tierras Nuevas Poniente, Puerto Rico
  9. 3.4 32 km N of San Antonio, Puerto Rico
  10. 2.7 17 km N of Arecibo, Puerto Rico
  11. 2.6 13 km NNE of Arecibo, Puerto Rico
  12. 2.9 25 km N of San Antonio, Puerto Rico
  13. 3.4 29 km N of Tierras Nuevas Poniente, Puerto Rico
  14. 2.7 12 km N of Brenas, Puerto Rico
  15. 2.0 10 km ESE of Maricao, 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.