QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

2 km SSW of G. L. Garcia, Puerto Rico

· 7.0 km deep · released about 12 lb of TNT

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10 km30 km60 km120 km N Cayey Municipio 4 kmCidra Municipio 9 kmCaguas Municipio 13 kmGuayama Municipio 15 kmSan Lorenzo Municipio 16 kmAibonito Municipio 16 kmAguas Buenas Municipio 17 kmComerío Municipio 17 kmArroyo Municipio 17 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
7.0 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 4 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2741 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× 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 18.1080, -66.1173. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 4 km (2 mi) E of here earthquakes near Cayey Municipio
Cidra Municipio, PR 9 km (5 mi) SSE of here earthquakes near Cidra Municipio
Caguas Municipio, PR 13 km (8 mi) SSW of here earthquakes near Caguas Municipio
Guayama Municipio, PR 15 km (9 mi) N of here earthquakes near Guayama Municipio
San Lorenzo Municipio, PR 16 km (10 mi) WSW of here earthquakes near San Lorenzo 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

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

  1. 2.4 19 km SE of Emajagua, Puerto Rico
  2. 2.3 10 km NNW of San Juan, Puerto Rico
  3. 1.8 8 km SE of Lamboglia, Puerto Rico
  4. 2.5 5 km SSE of El Negro, Puerto Rico
  5. 4.1 5 km SSE of El Negro, Puerto Rico
  6. 2.1 1 km NNE of El Negro, Puerto Rico
  7. 2.1 5 km S of Palo Seco, Puerto Rico
  8. 1.9 6 km SE of Lamboglia, Puerto Rico
  9. 2.3 8 km SE of Lamboglia, Puerto Rico
  10. 1.9 9 km SE of Lamboglia, Puerto Rico
  11. 2.1 1 km WSW of Los Llanos, Puerto Rico
  12. 2.5 2 km ENE of Pájaros, Puerto Rico
  13. 1.5 5 km NW of Coamo, Puerto Rico
  14. 1.8 0 km SSE of Jobos, Puerto Rico
  15. 1.9 2 km S of Barahona, 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 19,000 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.