QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

4 km SE of G. L. Garcia, Puerto Rico

· 8.0 km deep · released about 920 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 8 kmSan Lorenzo Municipio 12 kmCidra Municipio 13 kmCaguas Municipio 13 kmArroyo Municipio 14 kmPatillas Municipio 14 kmGuayama Municipio 15 kmAguas Buenas Municipio 19 kmAibonito Municipio 20 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
8.0 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 8 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3160 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 920 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 6.7 370,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 920 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 18.0933, -66.0756. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 8 km (5 mi) E of here earthquakes near Cayey Municipio
San Lorenzo Municipio, PR 12 km (8 mi) WSW of here earthquakes near San Lorenzo Municipio
Cidra Municipio, PR 13 km (8 mi) SE of here earthquakes near Cidra Municipio
Caguas Municipio, PR 13 km (8 mi) S of here earthquakes near Caguas Municipio
Arroyo Municipio, PR 14 km (9 mi) NNW of here earthquakes near Arroyo Municipio
Patillas Municipio, PR 14 km (9 mi) NW of here earthquakes near Patillas Municipio

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

Aftershocks so far

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

  1. 2.8 6 km SE of G. L. Garcia, Puerto Rico
  2. 2.2 4 km SW of Comerío, Puerto Rico
  3. 1.7 1 km S of Capitanejo, Puerto Rico
  4. 1.6 5 km SSE of Jobos, Puerto Rico
  5. 2.1 2 km NW of Bayamon, Puerto Rico
  6. 2.0 10 km S of Salinas, Puerto Rico
  7. 2.5 5 km SE of Pájaros, Puerto Rico
  8. 2.8 9 km ENE of San Juan, Puerto Rico
  9. 2.9 5 km NE of Guaynabo, Puerto Rico
  10. 2.4 28 km SSW of Central Aguirre, Puerto Rico
  11. 2.6 3 km N of Corozal, Puerto Rico
  12. 2.8 4 km NW of Bairoa, Puerto Rico
  13. 2.1 6 km NW of Palomas, Puerto Rico
  14. 2.8 1 km N of Bayamón, Puerto Rico
  15. 2.4 8 km ESE of Jayuya, 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 260 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.