QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8Md

Earthquake near Carrizales, PR

No earthquake was likely felt in Carrizales in the 24 hours to 10:02 pm AST (02:02 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 2.8 earthquake was recorded 19 km (12 mi) north-northeast of Carrizales, PR, at 2:28 am AST on 1 January 2017 (06:28 UTC), 24 km deep.

USGS: 18 km NNE of Carrizales, Puerto Rico

77 km (48 mi) WNW of San Juan, PR · 21 km (13 mi) N of Arecibo, PR

2:28 am AST, Jan 1, 2017 · · 24 km deep · released about 480 lb of TNT

Every earthquake near Carrizales Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hatillo Municipio 23 kmArecibo Municipio 24 kmCamuy Municipio 25 kmQuebradillas Municipio 28 kmBarceloneta Municipio 28 kmIsabela Municipio 33 kmManatí Municipio 35 kmFlorida Municipio 36 kmUtuado Municipio 42 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
2:28 am AST on 1 January 2017 ()
Where
19 km (12 mi) north-northeast of Carrizales, PR · earthquakes near Carrizales
Magnitude
M 2.8 (Md)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Hatillo Municipio, 23 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3602 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 13 km (8 mi) from the epicentre. In Carrizales, 19 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, Animas.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 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 · 45 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 18.6438, -66.7455. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hatillo Municipio, PR 23 km (14 mi) SSW earthquakes near Hatillo Municipio
Arecibo Municipio, PR 24 km (15 mi) SSE earthquakes near Arecibo Municipio
Camuy Municipio, PR 25 km (16 mi) SSW earthquakes near Camuy Municipio
Quebradillas Municipio, PR 28 km (17 mi) SW earthquakes near Quebradillas Municipio
Barceloneta Municipio, PR 28 km (17 mi) SE earthquakes near Barceloneta Municipio
Isabela Municipio, PR 33 km (21 mi) WSW earthquakes near Isabela Municipio

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

Aftershocks so far

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

  1. 2.7 52 km N of Carrizales, Puerto Rico
  2. 3.2 54 km N of Carrizales, Puerto Rico
  3. 3.0 15 km NNE of Carrizales, Puerto Rico
  4. 2.8 48 km N of Isabela, Puerto Rico
  5. 2.6 12 km N of Garrochales, Puerto Rico
  6. 2.9 32 km NNW of Brenas, Puerto Rico
  7. 4.0 61 km N of Hatillo, Puerto Rico
  8. 2.5 10 km N of Hatillo, Puerto Rico
  9. 2.9 Puerto Rico region
  10. 2.3 10 km NNE of Carrizales, Puerto Rico
  11. 3.0 Puerto Rico region
  12. 2.9 45 km N of Isabela, Puerto Rico
  13. 2.9 6 km N of Hatillo, Puerto Rico
  14. 2.7 9 km NNW of Garrochales, Puerto Rico
  15. 2.8 31 km N of Isabela, 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.