QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Earthquake near Camuy, PR

No earthquake was likely felt in Camuy in the 24 hours to 12:58 pm AST (16:58 UTC). The last one was M 3.4, 39 km (25 mi) NNW, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Camuy

This page: a magnitude 2.9 earthquake was recorded 7 km (4 mi) north-northwest of Camuy, PR, at 6:14 pm AST on 28 December 2017 (22:14 UTC), 85 km deep.

USGS: 6 km NNW of Camuy, Puerto Rico

87 km (54 mi) W of San Juan, PR · 17 km (11 mi) WNW of Arecibo, PR

6:14 pm AST, Dec 28, 2017 · · 85 km deep · released about 700 lb of TNT

Every earthquake near Camuy Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Quebradillas Municipio 10 kmCamuy Municipio 10 kmHatillo Municipio 13 kmIsabela Municipio 16 kmArecibo Municipio 24 kmSan Sebastián Municipio 25 kmMoca Municipio 28 kmLares Municipio 29 kmAguadilla Municipio 29 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
6:14 pm AST on 28 December 2017 ()
Where
7 km (4 mi) north-northwest of Camuy, PR · earthquakes near Camuy
Magnitude
M 2.9 (md)
Depth
85 km below the surface
Felt
no reports yet
Nearest
Quebradillas Municipio, 10 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3162 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 Camuy, 7 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: Hatillo, Quebradillas, Carrizales, Piedra Gorda, Cacao, Corcovado.

How big was it?

This earthquake released about 700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 700 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 8 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 · 38 km WNW of this epicentre
  3. 6.3 6 km WNW of Aguadilla, Puerto Rico · 37 km WSW of this epicentre
  4. 6.1 15 km WNW of San Antonio, Puerto Rico · 38 km W of this epicentre
  5. 6.1 18 km NNW of San Antonio, Puerto Rico · 34 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 18.5388, -66.8740. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Quebradillas Municipio, PR 10 km (6 mi) SW earthquakes near Quebradillas Municipio
Camuy Municipio, PR 10 km (6 mi) S earthquakes near Camuy Municipio
Hatillo Municipio, PR 13 km (8 mi) SE earthquakes near Hatillo Municipio
Isabela Municipio, PR 16 km (10 mi) WSW earthquakes near Isabela Municipio
Arecibo Municipio, PR 24 km (15 mi) ESE earthquakes near Arecibo Municipio
San Sebastián Municipio, PR 25 km (16 mi) SSW earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 2.8 49 km N of Isabela, Puerto Rico
  2. 2.8 1 km ESE of La Playa, Puerto Rico
  3. 2.2 3 km SW of Maricao, Puerto Rico
  4. 2.6 9 km NW of Aguadilla, Puerto Rico
  5. 2.7 1 km NW of La Playa, Puerto Rico
  6. 2.2 4 km NW of Maricao, Puerto Rico
  7. 2.5 18 km NNE of Isabela, Puerto Rico
  8. 2.9 2 km WNW of Vega Baja, Puerto Rico
  9. 2.0 4 km ENE of Hormigueros, Puerto Rico
  10. 1.9 5 km NNW of Santo Domingo, Puerto Rico
  11. 3.1 10 km N of Hatillo, Puerto Rico
  12. 3.1 8 km NNW of Arecibo, Puerto Rico
  13. 3.2 40 km N of Arecibo, Puerto Rico
  14. 2.0 6 km SSE of Lares, Puerto Rico
  15. 3.0 13 km NE 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.