QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km E of Las Marías, Puerto Rico

· 14 km deep · released about 47 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 4 kmSan Sebastián Municipio 9 kmMaricao Municipio 9 kmLares Municipio 10 kmSan Germán Municipio 18 kmAñasco Municipio 19 kmMoca Municipio 19 kmSabana Grande Municipio 19 kmHormigueros Municipio 21 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 2.1 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 4 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3094 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 lb of TNT

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 18.2548, -66.9588. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 4 km (2 mi) NNE of here earthquakes near Las Marías Municipio
San Sebastián Municipio, PR 9 km (5 mi) S of here earthquakes near San Sebastián Municipio
Maricao Municipio, PR 9 km (6 mi) NNW of here earthquakes near Maricao Municipio
Lares Municipio, PR 10 km (6 mi) WSW of here earthquakes near Lares Municipio
San Germán Municipio, PR 18 km (11 mi) NNE of here earthquakes near San Germán Municipio
Añasco Municipio, PR 19 km (12 mi) E of here earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 2.6 7 km SW of La Playa, Puerto Rico
  2. 1.7 3 km ESE of Ponce, Puerto Rico
  3. 1.9 5 km ESE of Ponce, Puerto Rico
  4. 2.0 3 km S of Boquerón, Puerto Rico
  5. 2.0 8 km WSW of Adjuntas, Puerto Rico
  6. 2.9 12 km NNE of Isabela, Puerto Rico
  7. 2.4 1 km N of Puerto Real, Puerto Rico
  8. 1.9 4 km ESE of Ponce, Puerto Rico
  9. 2.4 5 km SE of Ponce, Puerto Rico
  10. 2.1 5 km SE of Ponce, Puerto Rico
  11. 1.9 4 km ESE of Ponce, Puerto Rico
  12. 1.9 4 km SW of Coto Laurel, Puerto Rico
  13. 2.0 2 km SE of Ponce, Puerto Rico
  14. 2.3 4 km SE of Ponce, Puerto Rico
  15. 2.1 6 km SSW of La Playa, 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.