QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1Md

63 km WSW of Stella, Puerto Rico

· 64 km deep · released about 1,300 lb of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 13 kmRincón Municipio 64 kmAguada Municipio 71 kmCabo Rojo Municipio 72 kmAñasco Municipio 75 kmHormigueros Municipio 76 kmAguadilla Municipio 80 kmMoca Municipio 82 kmSan Germán Municipio 84 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
64 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 13 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3504 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 1,300 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 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 18.1872, -67.8318. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 13 km (8 mi) NNE of here earthquakes near Mayagüez Municipio
Rincón Municipio, PR 64 km (40 mi) WSW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 71 km (44 mi) WSW of here earthquakes near Aguada Municipio
Cabo Rojo Municipio, PR 72 km (45 mi) WNW of here earthquakes near Cabo Rojo Municipio
Añasco Municipio, PR 75 km (46 mi) W of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 76 km (47 mi) W of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 3.0 33 km W of Rincón, Puerto Rico
  2. 3.0 43 km WNW of Rincón, Puerto Rico
  3. 2.9 38 km WNW of Rincón, Puerto Rico
  4. 3.0 57 km E of Punta Cana, Dominican Republic
  5. 3.3 62 km SE of Punta Cana, Dominican Republic
  6. 1.8 35 km WNW of Rincón, Puerto Rico
  7. 3.0 36 km WNW of Rincón, Puerto Rico
  8. 2.7 44 km W of Rincón, Puerto Rico
  9. 3.2 61 km SE of Punta Cana, Dominican Republic
  10. 2.1 32 km WNW of Rincón, Puerto Rico
  11. 3.0 43 km WNW of Rincón, Puerto Rico
  12. 2.5 29 km WNW of Puerto Real, Puerto Rico
  13. 2.7 33 km WNW of Rincón, Puerto Rico
  14. 2.6 30 km SW of Stella, Puerto Rico
  15. 2.4 23 km SW of Stella, 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.