QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7Md

8 km WNW of Maricao, Puerto Rico

· 21 km deep · released about 340 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 9 kmHormigueros Municipio 10 kmSan Germán Municipio 10 kmAñasco Municipio 13 kmMaricao Municipio 13 kmSabana Grande Municipio 17 kmSan Sebastián Municipio 17 kmMoca Municipio 20 kmLares Municipio 22 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
21 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 9 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3488 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 340 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 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 18.1991, -67.0562. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 9 km (6 mi) WSW of here earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 10 km (6 mi) NE of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 10 km (6 mi) N of here earthquakes near San Germán Municipio
Añasco Municipio, PR 13 km (8 mi) SE of here earthquakes near Añasco Municipio
Maricao Municipio, PR 13 km (8 mi) WNW of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 17 km (11 mi) NW of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 2.4 5 km S of Adjuntas, Puerto Rico
  2. 1.8 28 km W of Puerto Real, Puerto Rico
  3. 1.6 3 km ENE of Pole Ojea, Puerto Rico
  4. 2.0 3 km SSE of Boquerón, Puerto Rico
  5. 3.0 17 km W of Stella, Puerto Rico
  6. 2.2 1 km SSW of Puerto Real, Puerto Rico
  7. 1.9 8 km NNE of Lluveras, Puerto Rico
  8. 2.7 1 km NW of Monte Grande, Puerto Rico
  9. 2.1 1 km W of Palmarejo, Puerto Rico
  10. 1.7 6 km NNE of San Germán, Puerto Rico
  11. 2.1 10 km S of Pole Ojea, Puerto Rico
  12. 2.7 10 km NW of Puerto Real, Puerto Rico
  13. 2.4 17 km SSW of Stella, Puerto Rico
  14. 1.9 10 km WNW of Puerto Real, Puerto Rico
  15. 1.9 5 km ENE of La Parguera, 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.