QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

1 km WSW of G. L. Garcia, Puerto Rico

· 25 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 4 kmCidra Municipio 8 kmCaguas Municipio 12 kmSan Lorenzo Municipio 15 kmAguas Buenas Municipio 15 kmAibonito Municipio 16 kmComerío Municipio 16 kmGuayama Municipio 17 kmArroyo Municipio 18 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 1.7 (md)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 4 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 216 days ago

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

How big was it?

This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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 18.1212, -66.1160. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 4 km (3 mi) ENE of here earthquakes near Cayey Municipio
Cidra Municipio, PR 8 km (5 mi) SE of here earthquakes near Cidra Municipio
Caguas Municipio, PR 12 km (8 mi) SW of here earthquakes near Caguas Municipio
San Lorenzo Municipio, PR 15 km (9 mi) W of here earthquakes near San Lorenzo Municipio
Aguas Buenas Municipio, PR 15 km (9 mi) S of here earthquakes near Aguas Buenas Municipio
Aibonito Municipio, PR 16 km (10 mi) E of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.2 3 km W of Vázquez, Puerto Rico
  2. 1.9 6 km S of Salinas, Puerto Rico
  3. 2.1 6 km S of Salinas, Puerto Rico
  4. 1.9 11 km S of Emajagua, Puerto Rico
  5. 2.0 5 km SSE of Salinas, Puerto Rico
  6. 2.4 7 km S of Salinas, Puerto Rico
  7. 2.1 7 km WSW of Naranjito, Puerto Rico
  8. 2.7 21 km SSE of Emajagua, Puerto Rico
  9. 2.1 8 km SE of Emajagua, Puerto Rico
  10. 2.0 6 km S of G. L. Garcia, Puerto Rico
  11. 2.0 2 km ENE of Aguas Buenas, Puerto Rico
  12. 3.4 8 km NNE of Brenas, Puerto Rico
  13. 1.8 6 km SSE of Arroyo, Puerto Rico
  14. 1.9 2 km N of Santa Isabel, Puerto Rico
  15. 1.9 1 km SSW of Candelaria Arenas, 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 20,000 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.