QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Cayuco, PR

No earthquake was likely felt in Cayuco in the 24 hours to 12:52 pm AST (16:52 UTC). The last one was M 3.1, 41 km (26 mi) SSW, at 3:58 pm AST on 31 October 2026, estimated intensity II (weak) in town. Every earthquake near Cayuco

This page: a magnitude 2.4 earthquake was recorded 4 km (2 mi) west of Cayuco, PR, at 2:08 am AST on 10 November 2023 (06:08 UTC), 35 km deep.

USGS: 3 km W of Cayuco, Puerto Rico

76 km (47 mi) W of San Juan, PR · 19 km (12 mi) SSW of Arecibo, PR

2:08 am AST, Nov 10, 2023 · · 35 km deep · released about 120 lb of TNT

Every earthquake near Cayuco Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Utuado Municipio 8 kmLares Municipio 10 kmAdjuntas Municipio 13 kmHatillo Municipio 17 kmArecibo Municipio 19 kmCamuy Municipio 19 kmSan Sebastián Municipio 21 kmMaricao Municipio 21 kmJayuya Municipio 22 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
2:08 am AST on 10 November 2023 ()
Where
4 km (2 mi) west of Cayuco, PR · earthquakes near Cayuco
Magnitude
M 2.4 (md)
Depth
35 km below the surface
Felt
no reports yet
Nearest
Utuado Municipio, 8 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1097 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Cayuco, 4 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: Utuado, Quebrada, Lares, Rafael Capo, Rafael Gonzalez, Juncal.

How big was it?

This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 92,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.2× the energy of this one
  4. This earthquake M 2.4 about 120 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 6.4 on 2020-01-07 — about 1,000,000 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 49 km WNW of this epicentre
  2. 5.8 12 km N of Garrochales, Puerto Rico · 37 km NE of this epicentre
  3. 5.8 4 km E of Moca, Puerto Rico · 33 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 18.2930, -66.7765. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Utuado Municipio, PR 8 km (5 mi) ESE earthquakes near Utuado Municipio
Lares Municipio, PR 10 km (6 mi) W earthquakes near Lares Municipio
Adjuntas Municipio, PR 13 km (8 mi) S earthquakes near Adjuntas Municipio
Hatillo Municipio, PR 17 km (10 mi) N earthquakes near Hatillo Municipio
Arecibo Municipio, PR 19 km (12 mi) NE earthquakes near Arecibo Municipio
Camuy Municipio, PR 19 km (12 mi) NNW earthquakes near Camuy Municipio

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

Aftershocks so far

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

  1. 2.5 4 km SSW of Guánica, Puerto Rico
  2. 2.8 3 km SW of Guánica, Puerto Rico
  3. 2.6 4 km NNE of Carrizales, Puerto Rico
  4. 2.1 Puerto Rico region
  5. 2.1 5 km SSW of Gu?nica, Puerto Rico
  6. 2.3 3 km WSW of Gu?nica, Puerto Rico
  7. 2.9 2 km WSW of Guánica, Puerto Rico
  8. 2.5 2 km WSW of Guánica, Puerto Rico
  9. 2.1 3 km SSW of Guánica, Puerto Rico
  10. 1.9 1 km W of Fuig, Puerto Rico
  11. 2.1 2 km WSW of Guánica, Puerto Rico
  12. 2.3 3 km WNW of Palmarejo, Puerto Rico
  13. 2.5 3 km SW of Gu?nica, Puerto Rico
  14. 2.4 3 km SW of Gu?nica, Puerto Rico
  15. 2.9 4 km SW of Guánica, 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.