QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

55 km W of Puerto Real, Puerto Rico

· 5.0 km deep · released about 1,400 lb of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 20 kmCabo Rojo Municipio 56 kmRincón Municipio 59 kmHormigueros Municipio 64 kmAguada Municipio 67 kmAñasco Municipio 67 kmLajas Municipio 71 kmSan Germán Municipio 71 kmMoca Municipio 77 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
5.0 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 20 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1764 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 1,400 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 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× 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 18.0323, -67.7085. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 20 km (12 mi) ESE of here earthquakes near Mayagüez Municipio
Cabo Rojo Municipio, PR 56 km (35 mi) W of here earthquakes near Cabo Rojo Municipio
Rincón Municipio, PR 59 km (37 mi) SW of here earthquakes near Rincón Municipio
Hormigueros Municipio, PR 64 km (40 mi) W of here earthquakes near Hormigueros Municipio
Aguada Municipio, PR 67 km (42 mi) SW of here earthquakes near Aguada Municipio
Añasco Municipio, PR 67 km (42 mi) WSW of here earthquakes near Añasco 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. 3.1 78 km SE of Boca de Yuma, Dominican Republic
  2. 2.4 18 km NW of Puerto Real, Puerto Rico
  3. 2.7 15 km SW of La Playa, Puerto Rico
  4. 4.0 56 km SE of Punta Cana, Dominican Republic
  5. 3.0 66 km SE of Punta Cana, Dominican Republic
  6. 1.9 12 km WSW of Pole Ojea, Puerto Rico
  7. 3.4 34 km WSW of Stella, Puerto Rico
  8. 3.1 64 km W of Stella, Puerto Rico
  9. 1.6 8 km W of Pole Ojea, Puerto Rico
  10. 3.4 39 km WSW of Stella, Puerto Rico
  11. 3.3 21 km SW of Stella, Puerto Rico
  12. 2.2 21 km SW of Stella, Puerto Rico
  13. 3.2 35 km WSW of Pole Ojea, Puerto Rico
  14. 2.4 9 km W of Puerto Real, Puerto Rico
  15. 1.9 12 km WNW of Puerto Real, 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 4.4 on 2017-10-01 — it released about 83 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.