QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Earthquake near Arecibo, PR

No earthquake was likely felt in Arecibo in the 24 hours to 6:05 pm AST (22:05 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 2.9 earthquake was recorded 37 km (23 mi) north of Arecibo, PR, at 1:43 am AST on 16 November 2023 (05:43 UTC), 17 km deep.

USGS: 35 km N of Carrizales, Puerto Rico

84 km (52 mi) WNW of San Juan, PR · 39 km (24 mi) N of Arecibo, PR

1:43 am AST, Nov 16, 2023 · · 17 km deep · released about 630 lb of TNT

Every earthquake near Arecibo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hatillo Municipio 41 kmArecibo Municipio 41 kmBarceloneta Municipio 42 kmCamuy Municipio 42 kmQuebradillas Municipio 42 kmIsabela Municipio 46 kmManatí Municipio 48 kmFlorida Municipio 52 kmVega Baja Municipio 53 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
1:43 am AST on 16 November 2023 ()
Where
37 km (23 mi) north of Arecibo, PR · earthquakes near Arecibo
Magnitude
M 2.9 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Hatillo Municipio, 41 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1092 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 26 km (16 mi) from the epicentre. In Arecibo, 37 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.

How big was it?

This earthquake released about 630 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 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 4.8 on 2017-08-18 — about 760 times the energy of this one.

Before 2016, the USGS record lists 15 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 41 km WNW of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 49 km WSW of this epicentre
  3. 6.4 61 km N of Hatillo, Puerto Rico · 28 km NNW of this epicentre
  4. 6.1 18 km NNW of San Antonio, Puerto Rico · 50 km WSW of this epicentre
  5. 5.9 78 km N of Arecibo, Puerto Rico · 43 km NNE 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 18.8018, -66.7408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hatillo Municipio, PR 41 km (25 mi) S earthquakes near Hatillo Municipio
Arecibo Municipio, PR 41 km (26 mi) S earthquakes near Arecibo Municipio
Barceloneta Municipio, PR 42 km (26 mi) SSE earthquakes near Barceloneta Municipio
Camuy Municipio, PR 42 km (26 mi) SSW earthquakes near Camuy Municipio
Quebradillas Municipio, PR 42 km (26 mi) SSW earthquakes near Quebradillas Municipio
Isabela Municipio, PR 46 km (28 mi) SW earthquakes near Isabela Municipio

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

Aftershocks so far

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

  1. 3.0 12 km NNW of Camuy, Puerto Rico
  2. 3.3 36 km N of Isabela, Puerto Rico
  3. 3.0 69 km N of Brenas, Puerto Rico
  4. 2.7 6 km NW of Camuy, Puerto Rico
  5. 3.1 13 km N of San Antonio, Puerto Rico
  6. 3.2 54 km N of Isabela, Puerto Rico
  7. 3.1 21 km N of Brenas, Puerto Rico
  8. 3.1 11 km NNE of Carrizales, Puerto Rico
  9. 3.1 8 km NNW of Sabana, Puerto Rico
  10. 3.4 8 km N of Arecibo, Puerto Rico
  11. 2.7 17 km N of Hatillo, Puerto Rico
  12. 3.3 70 km N of Isabela, Puerto Rico
  13. 2.9 25 km NNE of Arecibo, Puerto Rico
  14. 3.1 50 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.3 10 km NNE of Carrizales, 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.