QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

16 km WNW of Puerto Real, Puerto Rico

· 7.4 km deep · released about 1,700 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 22 kmCabo Rojo Municipio 23 kmRincón Municipio 23 kmAñasco Municipio 26 kmAguada Municipio 30 kmSan Germán Municipio 31 kmLajas Municipio 36 kmMoca Municipio 37 kmLas Marías Municipio 38 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 3.2 (md)
Depth
7.4 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 22 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 29 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,500× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× more

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 18.1470, -67.3278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 22 km (14 mi) W of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 23 km (14 mi) NW of here earthquakes near Cabo Rojo Municipio
Rincón Municipio, PR 23 km (14 mi) SSW of here earthquakes near Rincón Municipio
Añasco Municipio, PR 26 km (16 mi) SW of here earthquakes near Añasco Municipio
Aguada Municipio, PR 30 km (18 mi) SSW of here earthquakes near Aguada Municipio
San Germán Municipio, PR 31 km (19 mi) W of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 2.1 4 km ENE of La Parguera, Puerto Rico
  2. 2.3 2 km SSW of Las Marías, Puerto Rico
  3. 2.7 20 km SW of Stella, Puerto Rico
  4. 2.3 2 km SSW of La Parguera, Puerto Rico
  5. 1.6 11 km SSE of La Parguera, Puerto Rico
  6. 2.6 6 km SW of Guánica, Puerto Rico
  7. 2.7 3 km ENE of Sabana Grande, Puerto Rico
  8. 2.3 1 km SSW of Guánica, Puerto Rico
  9. 3.2 8 km WNW of Maricao, Puerto Rico
  10. 2.2 5 km WSW of Guánica, Puerto Rico
  11. 3.0 31 km WSW of Stella, Puerto Rico
  12. 2.5 4 km SSW of Añasco, Puerto Rico
  13. 1.8 2 km NW of Fuig, Puerto Rico
  14. 3.4 36 km WSW of Stella, Puerto Rico
  15. 2.6 3 km SW of La Parguera, 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 5.3 on 2020-07-03 — it released about 1,600 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.