QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

4 km SSE of Cayey, Puerto Rico

· 27 km deep · released about 800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 3 kmCidra Municipio 11 kmGuayama Municipio 11 kmAibonito Municipio 14 kmArroyo Municipio 16 kmSalinas Municipio 17 kmCaguas Municipio 18 kmPatillas Municipio 18 kmComerío Municipio 19 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
Magnitude
M 3.0 (md)
Depth
27 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 3 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3120 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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.

Where

Epicentre 18.0761, -66.1411. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 3 km (2 mi) SSE of here earthquakes near Cayey Municipio
Cidra Municipio, PR 11 km (7 mi) S of here earthquakes near Cidra Municipio
Guayama Municipio, PR 11 km (7 mi) N of here earthquakes near Guayama Municipio
Aibonito Municipio, PR 14 km (9 mi) ESE of here earthquakes near Aibonito Municipio
Arroyo Municipio, PR 16 km (10 mi) NW of here earthquakes near Arroyo Municipio
Salinas Municipio, PR 17 km (11 mi) NE of here earthquakes near Salinas Municipio

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

Aftershocks so far

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

  1. 2.4 28 km SSW of Central Aguirre, Puerto Rico
  2. 3.2 13 km S of Potala Pastillo, Puerto Rico
  3. 2.6 3 km N of Corozal, Puerto Rico
  4. 2.8 4 km NW of Bairoa, Puerto Rico
  5. 2.1 6 km NW of Palomas, Puerto Rico
  6. 2.8 1 km N of Bayamón, Puerto Rico
  7. 2.4 8 km ESE of Jayuya, Puerto Rico
  8. 3.0 1 km N of Ingenio, Puerto Rico
  9. 3.3 1 km SE of Sumidero, Puerto Rico
  10. 2.9 4 km SE of Cataño, Puerto Rico
  11. 2.3 2 km ESE of Humacao, Puerto Rico
  12. 1.9 11 km SSW of Potala Pastillo, Puerto Rico
  13. 2.7 4 km WNW of San Juan, Puerto Rico
  14. 2.0 9 km SSW of Central Aguirre, Puerto Rico
  15. 2.2 9 km SSE of Jobos, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2016-12-05 — it released about 300 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.