QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

5 km ESE of Las Marías, Puerto Rico

· 17 km deep · released about 350 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 4 kmMaricao Municipio 7 kmLares Municipio 9 kmSan Sebastián Municipio 11 kmSabana Grande Municipio 17 kmSan Germán Municipio 17 kmYauco Municipio 19 kmAdjuntas Municipio 21 kmAñasco 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 2.7 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 4 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2744 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 350 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 43,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 31,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.7× the energy of this one
  4. This earthquake M 2.7 about 350 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 18.2348, -66.9441. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 4 km (2 mi) ENE of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 7 km (4 mi) N of here earthquakes near Maricao Municipio
Lares Municipio, PR 9 km (6 mi) WSW of here earthquakes near Lares Municipio
San Sebastián Municipio, PR 11 km (7 mi) SSE of here earthquakes near San Sebastián Municipio
Sabana Grande Municipio, PR 17 km (10 mi) N of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 17 km (11 mi) NE 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

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

  1. 1.5 3 km NNE of Mayagüez, Puerto Rico
  2. 2.0 12 km NNW of Hatillo, Puerto Rico
  3. 2.3 18 km S of La Parguera, Puerto Rico
  4. 1.9 4 km NNW of Sabana Grande, Puerto Rico
  5. 1.8 9 km WNW of Puerto Real, Puerto Rico
  6. 1.8 18 km SSW of Guánica, Puerto Rico
  7. 1.6 1 km NW of Coto Laurel, Puerto Rico
  8. 2.4 Puerto Rico region
  9. 2.1 3 km NW of Quebradillas, Puerto Rico
  10. 1.6 3 km SSE of Mayagüez, Puerto Rico
  11. 1.9 1 km ENE of Hormigueros, Puerto Rico
  12. 2.7 19 km N of Isabela, Puerto Rico
  13. 1.8 3 km SW of Las Marías, Puerto Rico
  14. 1.8 15 km NW of Puerto Real, Puerto Rico
  15. 2.1 0 km SW of Lajas, 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.