QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

4 km NW of Cabo Rojo, Puerto Rico

· 23 km deep · released about 10 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 7 kmCabo Rojo Municipio 13 kmSan Germán Municipio 14 kmAñasco Municipio 20 kmLajas Municipio 20 kmSabana Grande Municipio 24 kmLas Marías Municipio 24 kmMaricao Municipio 26 kmRincón Municipio 27 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
23 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 7 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3433 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 10 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 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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 18.1121, -67.1730. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 7 km (4 mi) WSW of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 13 km (8 mi) N of here earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 14 km (9 mi) W of here earthquakes near San Germán Municipio
Añasco Municipio, PR 20 km (12 mi) SSW of here earthquakes near Añasco Municipio
Lajas Municipio, PR 20 km (13 mi) NW of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 24 km (15 mi) W of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 1.5 6 km SSE of Pole Ojea, Puerto Rico
  2. 2.3 22 km SW of Stella, Puerto Rico
  3. 1.8 3 km SSW of Cabo Rojo, Puerto Rico
  4. 1.9 24 km SW of Stella, Puerto Rico
  5. 1.9 13 km WNW of Puerto Real, Puerto Rico
  6. 1.8 15 km SSW of Guánica, Puerto Rico
  7. 2.6 0 km NNE of Lajas, Puerto Rico
  8. 2.0 10 km NW of Puerto Real, Puerto Rico
  9. 1.7 11 km NE of Sabana Grande, Puerto Rico
  10. 1.9 Puerto Rico region
  11. 1.6 6 km WNW of Puerto Real, Puerto Rico
  12. 2.1 10 km ESE of Maricao, Puerto Rico
  13. 3.2 4 km NW of Mayagüez, Puerto Rico
  14. 1.8 3 km NNE of Monte Grande, Puerto Rico
  15. 2.1 8 km WSW of Guánica, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.