QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

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

· 24 km deep · released about 800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 5 kmCidra Municipio 11 kmGuayama Municipio 13 kmArroyo Municipio 14 kmCaguas Municipio 15 kmSan Lorenzo Municipio 16 kmPatillas Municipio 16 kmAibonito Municipio 17 kmAguas Buenas 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
24 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Cayey Municipio, 5 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1510 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

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 18.0852, -66.1100. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 5 km (3 mi) ESE of here earthquakes near Cayey Municipio
Cidra Municipio, PR 11 km (7 mi) SSE of here earthquakes near Cidra Municipio
Guayama Municipio, PR 13 km (8 mi) NNE of here earthquakes near Guayama Municipio
Arroyo Municipio, PR 14 km (9 mi) NNW of here earthquakes near Arroyo Municipio
Caguas Municipio, PR 15 km (10 mi) SSW of here earthquakes near Caguas Municipio
San Lorenzo Municipio, PR 16 km (10 mi) WSW of here earthquakes near San Lorenzo Municipio

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

Aftershocks so far

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

  1. 3.2 3 km ENE of Guaynabo, Puerto Rico
  2. 2.3 3 km ESE of Comerío, Puerto Rico
  3. 3.7 4 km E of Punta Santiago, Puerto Rico
  4. 3.1 5 km ESE of Punta Santiago, Puerto Rico
  5. 1.8 3 km SW of Naranjito, Puerto Rico
  6. 3.4 1 km SSW of Pájaros, Puerto Rico
  7. 1.6 9 km S of Potala Pastillo, Puerto Rico
  8. 2.3 1 km S of Capitanejo, Puerto Rico
  9. 3.5 1 km NNW of Trujillo Alto, Puerto Rico
  10. 2.8 13 km SSE of Central Aguirre, Puerto Rico
  11. 3.1 9 km S of Jobos, Puerto Rico
  12. 3.4 16 km SSE of Central Aguirre, Puerto Rico
  13. 3.3 27 km SSE of Jobos, Puerto Rico
  14. 2.6 5 km WNW of Jagual, Puerto Rico
  15. 2.4 6 km ESE of Villalba, 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.