QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1Md

6 km SSW of La Playa, Puerto Rico

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

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10 km30 km60 km120 km N Añasco Municipio 11 kmRincón Municipio 12 kmHormigueros Municipio 16 kmAguada Municipio 16 kmMoca Municipio 22 kmSan Germán Municipio 24 kmLas Marías Municipio 26 kmCabo Rojo Municipio 27 kmAguadilla Municipio 28 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
129 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 11 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3631 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 18.2357, -67.2220. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 11 km (7 mi) WSW of here earthquakes near Añasco Municipio
Rincón Municipio, PR 12 km (7 mi) SSE of here earthquakes near Rincón Municipio
Hormigueros Municipio, PR 16 km (10 mi) NW of here earthquakes near Hormigueros Municipio
Aguada Municipio, PR 16 km (10 mi) SSW of here earthquakes near Aguada Municipio
Moca Municipio, PR 22 km (14 mi) SW of here earthquakes near Moca Municipio
San Germán Municipio, PR 24 km (15 mi) NW 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

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

  1. 1.6 6 km S of La Parguera, Puerto Rico
  2. 2.0 8 km ESE of Maricao, Puerto Rico
  3. 2.5 2 km ESE of La Playa, Puerto Rico
  4. 2.6 21 km SW of Stella, Puerto Rico
  5. 3.1 33 km NW of Rincón, Puerto Rico
  6. 2.5 4 km WNW of Aguada, Puerto Rico
  7. 2.8 8 km N of Quebradillas, Puerto Rico
  8. 2.7 4 km NNW of La Playa, Puerto Rico
  9. 2.0 10 km W of Puerto Real, Puerto Rico
  10. 1.8 17 km W of Rincón, Puerto Rico
  11. 2.7 3 km SW of Aguada, Puerto Rico
  12. 2.6 10 km WSW of Mayagüez, Puerto Rico
  13. 1.5 3 km ENE of Pole Ojea, Puerto Rico
  14. 2.2 20 km WNW of Rincón, Puerto Rico
  15. 2.0 8 km WNW of Adjuntas, 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.