QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

Earthquake near Arecibo, PR

No earthquake was likely felt in Arecibo in the 24 hours to 4:10 pm AST (20:10 UTC). The last one was M 3.4, 49 km (31 mi) NW, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Arecibo

This page: a magnitude 2.6 earthquake was recorded 43 km (27 mi) west-northwest of Arecibo, PR, at 2:26 pm AST on 29 January 2019 (18:26 UTC), 65 km deep.

USGS: 15 km N of San Antonio, Puerto Rico

42 km (26 mi) WNW of Arecibo, PR · 111 km (69 mi) WNW of San Juan, PR

2:26 pm AST, Jan 29, 2019 · · 65 km deep · released about 220 lb of TNT

Every earthquake near Arecibo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 18 kmIsabela Municipio 19 kmQuebradillas Municipio 25 kmMoca Municipio 29 kmAguada Municipio 31 kmCamuy Municipio 32 kmSan Sebastián Municipio 36 kmRincón Municipio 37 kmHatillo Municipio 37 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
2:26 pm AST on 29 January 2019 ()
Where
43 km (27 mi) west-northwest of Arecibo, PR · earthquakes near Arecibo
Magnitude
M 2.6 (md)
Depth
65 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 18 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2843 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 Arecibo, 43 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: Isabela, Rafael Hernandez, Mora, Aceitunas, Caban, Quebradillas.

How big was it?

This earthquake released about 220 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 68,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 48,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.3× the energy of this one
  4. This earthquake M 2.6 about 220 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 380 times the energy of this one.

Before 2016, the USGS record lists 13 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 30 km N of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 13 km NW of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 31 km W of this epicentre
  4. 6.3 6 km WNW of Aguadilla, Puerto Rico · 25 km SSW of this epicentre
  5. 6.1 15 km WNW of San Antonio, Puerto Rico · 18 km WSW 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 18.6345, -67.0888. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguadilla Municipio, PR 18 km (11 mi) SSW earthquakes near Aguadilla Municipio
Isabela Municipio, PR 19 km (11 mi) SSE earthquakes near Isabela Municipio
Quebradillas Municipio, PR 25 km (16 mi) SE earthquakes near Quebradillas Municipio
Moca Municipio, PR 29 km (18 mi) S earthquakes near Moca Municipio
Aguada Municipio, PR 31 km (19 mi) SSW earthquakes near Aguada Municipio
Camuy Municipio, PR 32 km (20 mi) SE earthquakes near Camuy Municipio

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

Aftershocks so far

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

  1. 2.5 48 km NW of San Antonio, Puerto Rico
  2. 2.7 30 km NW of Aguadilla, Puerto Rico
  3. 2.8 47 km NW of San Antonio, Puerto Rico
  4. 2.9 4 km S of La Playa, Puerto Rico
  5. 1.9 22 km W of Rincón, Puerto Rico
  6. 2.0 3 km WNW of Maricao, Puerto Rico
  7. 2.4 22 km NNW of Isabela, Puerto Rico
  8. 1.7 27 km NW of Rincón, Puerto Rico
  9. 2.8 24 km N of Hatillo, Puerto Rico
  10. 2.0 36 km N of San Antonio, Puerto Rico
  11. 3.0 54 km N of Isabela, Puerto Rico
  12. 2.7 49 km NW of San Antonio, Puerto Rico
  13. 2.2 2 km ESE of Las Marías, Puerto Rico
  14. 2.2 3 km ESE of Las Marías, Puerto Rico
  15. 1.7 2 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.