QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km ESE of Lares, Puerto Rico

· 9.0 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Lares Municipio 6 kmAdjuntas Municipio 11 kmUtuado Municipio 11 kmMaricao Municipio 17 kmSan Sebastián Municipio 18 kmLas Marías Municipio 18 kmHatillo Municipio 19 kmCamuy Municipio 20 kmYauco 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
9.0 km below the surface
Felt
no reports yet
Nearest
Lares Municipio, 6 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2520 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 18.2686, -66.8113. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lares Municipio, PR 6 km (4 mi) E of here earthquakes near Lares Municipio
Adjuntas Municipio, PR 11 km (7 mi) NNW of here earthquakes near Adjuntas Municipio
Utuado Municipio, PR 11 km (7 mi) W of here earthquakes near Utuado Municipio
Maricao Municipio, PR 17 km (10 mi) NE of here earthquakes near Maricao Municipio
San Sebastián Municipio, PR 18 km (11 mi) ESE of here earthquakes near San Sebastián Municipio
Las Marías Municipio, PR 18 km (11 mi) ENE of here earthquakes near Las Marías Municipio

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

Aftershocks so far

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

  1. 2.5 7 km NNW of Puerto Real, Puerto Rico
  2. 2.0 7 km NW of Puerto Real, Puerto Rico
  3. 2.0 1 km NE of Hormigueros, Puerto Rico
  4. 1.9 12 km SSE of Ponce, Puerto Rico
  5. 2.0 6 km NNE of Sabana Grande, Puerto Rico
  6. 2.3 6 km NW of Aguada, Puerto Rico
  7. 2.3 1 km ENE of Stella, Puerto Rico
  8. 2.1 8 km SW of La Parguera, Puerto Rico
  9. 2.1 12 km SSE of Ponce, Puerto Rico
  10. 2.2 5 km SW of La Parguera, Puerto Rico
  11. 2.3 9 km SSW of Potala Pastillo, Puerto Rico
  12. 1.9 4 km ENE of Hormigueros, Puerto Rico
  13. 1.8 13 km S of Ponce, Puerto Rico
  14. 1.8 1 km S of Guayanilla, Puerto Rico
  15. 2.8 7 km NNE of Hatillo, 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.