QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

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

· 25 km deep · released about 7.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 4 kmCidra Municipio 8 kmCaguas Municipio 13 kmSan Lorenzo Municipio 15 kmGuayama Municipio 16 kmAguas Buenas Municipio 16 kmAibonito Municipio 16 kmComerío 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 1.6 (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 209 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 7.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.3 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 18.1140, -66.1137. 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 13 km (8 mi) SSW of here earthquakes near Caguas Municipio
San Lorenzo Municipio, PR 15 km (9 mi) WSW of here earthquakes near San Lorenzo Municipio
Guayama Municipio, PR 16 km (10 mi) N of here earthquakes near Guayama Municipio
Aguas Buenas Municipio, PR 16 km (10 mi) S of here earthquakes near Aguas Buenas Municipio

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

Aftershocks so far

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

  1. 2.9 2 km NW of Sabana, Puerto Rico
  2. 2.1 7 km S of Salinas, Puerto Rico
  3. 2.2 5 km ENE of Comerío, Puerto Rico
  4. 2.2 3 km SSW of Salinas, Puerto Rico
  5. 2.0 8 km S of Salinas, Puerto Rico
  6. 1.9 1 km E of Salinas, Puerto Rico
  7. 2.2 3 km W of Vázquez, Puerto Rico
  8. 1.9 6 km S of Salinas, Puerto Rico
  9. 2.1 6 km S of Salinas, Puerto Rico
  10. 1.9 11 km S of Emajagua, Puerto Rico
  11. 2.0 5 km SSE of Salinas, Puerto Rico
  12. 2.4 7 km S of Salinas, Puerto Rico
  13. 2.1 7 km WSW of Naranjito, Puerto Rico
  14. 2.7 21 km SSE of Emajagua, Puerto Rico
  15. 2.1 8 km SE of Emajagua, 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 33,000 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.