QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Caguas, PR

No earthquake was likely felt in Caguas in the 24 hours to 10:47 am AST (14:47 UTC). The last one was M 4.1, 81 km (50 mi) ESE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Caguas

This page: a magnitude 2.5 earthquake was recorded 3 km (2 mi) south-southeast of Caguas, PR, at 6:13 pm AST on 4 October 2023 (22:13 UTC), 16 km deep. 1 person has reported feeling it to USGS.

USGS: 2 km SSE of Caguas, Puerto Rico

in Caguas, PR

6:13 pm AST, Oct 4, 2023 · · 16 km deep · released about 160 lb of TNT

Every earthquake near Caguas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Caguas Municipio 1 kmGurabo Municipio 9 kmSan Lorenzo Municipio 10 kmAguas Buenas Municipio 11 kmJuncos Municipio 14 kmCidra Municipio 14 kmTrujillo Alto Municipio 14 kmGuaynabo Municipio 17 kmCayey Municipio 17 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
6:13 pm AST on 4 October 2023 ()
Where
3 km (2 mi) south-southeast of Caguas, PR · earthquakes near Caguas
Magnitude
M 2.5 (md)
Depth
16 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Caguas Municipio, 1 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1133 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 15 km (9 mi) from the epicentre. In Caguas, 3 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.

Likely felt in: Caguas 3 km, intensity II · Jagual 7 km, intensity II · Sumidero 10 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 160 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 95,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 68,000× the energy of this one
  3. Around the size people start to feel M 3.0 6× the energy of this one
  4. This earthquake M 2.5 about 160 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 4.6 on 2016-12-05 — about 1,500 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 11 km WNW of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 45 km NW 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 18.2142, -66.0375. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Caguas Municipio, PR 1 km (1 mi) WSW earthquakes near Caguas Municipio
Gurabo Municipio, PR 9 km (5 mi) NE earthquakes near Gurabo Municipio
San Lorenzo Municipio, PR 10 km (6 mi) SE earthquakes near San Lorenzo Municipio
Aguas Buenas Municipio, PR 11 km (7 mi) WNW earthquakes near Aguas Buenas Municipio
Juncos Municipio, PR 14 km (8 mi) E earthquakes near Juncos Municipio
Cidra Municipio, PR 14 km (9 mi) WSW earthquakes near Cidra Municipio

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

Aftershocks so far

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

  1. 2.0 1 km N of Parcelas Pe?uelas, Puerto Rico
  2. 2.6 9 km S of Arroyo, Puerto Rico
  3. 2.6 1 km SSW of San Lorenzo, Puerto Rico
  4. 1.8 6 km NW of Yaurel, Puerto Rico
  5. 2.6 Puerto Rico region
  6. 3.0 3 km WNW of San Lorenzo, Puerto Rico
  7. 2.0 5 km S of Salinas, Puerto Rico
  8. 2.9 4 km SSE of Salinas, Puerto Rico
  9. 2.5 7 km S of Orocovis, Puerto Rico
  10. 2.1 5 km S of Salinas, Puerto Rico
  11. 2.5 5 km S of Salinas, Puerto Rico
  12. 2.3 6 km S of Salinas, Puerto Rico
  13. 2.4 4 km WSW of Central Aguirre, Puerto Rico
  14. 2.5 Puerto Rico region
  15. 2.1 7 km S of Salinas, 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.