QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

25 km W of Puerto Real, Puerto Rico

· 2.7 km deep · released about 1,200 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 27 kmHormigueros Municipio 34 kmRincón Municipio 36 kmAñasco Municipio 40 kmSan Germán Municipio 42 kmLajas Municipio 42 kmAguada Municipio 44 kmMayagüez Municipio 48 kmSabana Grande Municipio 51 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 3.1 (md)
Depth
2.7 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Cabo Rojo Municipio, 27 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 519 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× 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 18.0583, -67.4283. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 27 km (17 mi) WNW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 34 km (21 mi) WSW of here earthquakes near Hormigueros Municipio
Rincón Municipio, PR 36 km (23 mi) SSW of here earthquakes near Rincón Municipio
Añasco Municipio, PR 40 km (25 mi) SW of here earthquakes near Añasco Municipio
San Germán Municipio, PR 42 km (26 mi) W of here earthquakes near San Germán Municipio
Lajas Municipio, PR 42 km (26 mi) WNW of here earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 3.3 52 km W of Stella, Puerto Rico
  2. 2.0 4 km ESE of La Parguera, Puerto Rico
  3. 2.3 5 km SE of Boquerón, Puerto Rico
  4. 2.2 2 km S of Sabana Grande, Puerto Rico
  5. 3.0 5 km SE of La Parguera, Puerto Rico
  6. 2.5 28 km SW of Stella, Puerto Rico
  7. 2.4 5 km W of Fuig, Puerto Rico
  8. 2.8 6 km ESE of La Parguera, Puerto Rico
  9. 2.7 6 km ESE of La Parguera, Puerto Rico
  10. 2.3 6 km ESE of La Parguera, Puerto Rico
  11. 2.2 1 km S of Maricao, Puerto Rico
  12. 2.3 2 km WSW of La Parguera, Puerto Rico
  13. 1.9 3 km SW of Sabana Grande, Puerto Rico
  14. 2.7 2 km W of La Parguera, Puerto Rico
  15. 3.3 36 km WSW of Pole Ojea, 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 2,300 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.