QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

5 km W of Maricao, Puerto Rico

· 19 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 8 kmSan Germán Municipio 8 kmHormigueros Municipio 10 kmMaricao Municipio 11 kmSabana Grande Municipio 14 kmAñasco Municipio 15 kmSan Sebastián Municipio 18 kmLares Municipio 21 kmYauco 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 2.1 (Md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 8 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3656 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 18.1819, -67.0364. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 8 km (5 mi) SW of here earthquakes near Las Marías Municipio
San Germán Municipio, PR 8 km (5 mi) N of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 10 km (6 mi) ENE of here earthquakes near Hormigueros Municipio
Maricao Municipio, PR 11 km (7 mi) W of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 14 km (9 mi) NW of here earthquakes near Sabana Grande Municipio
Añasco Municipio, PR 15 km (10 mi) SE of here earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 1.9 4 km SE of Maricao, Puerto Rico
  2. 1.6 11 km SW of La Parguera, Puerto Rico
  3. 2.5 7 km SW of La Parguera, Puerto Rico
  4. 1.8 6 km SW of La Parguera, Puerto Rico
  5. 2.3 21 km S of Guánica, Puerto Rico
  6. 2.8 32 km W of Puerto Real, Puerto Rico
  7. 1.8 7 km NNW of Yauco, Puerto Rico
  8. 1.9 5 km SSE of Pole Ojea, Puerto Rico
  9. 1.8 8 km SSE of Maria Antonia, Puerto Rico
  10. 2.5 1 km ESE of Maria Antonia, Puerto Rico
  11. 2.4 1 km SE of Maria Antonia, Puerto Rico
  12. 2.2 6 km SSE of Maria Antonia, Puerto Rico
  13. 1.8 6 km S of La Parguera, Puerto Rico
  14. 2.5 1 km SSE of Maria Antonia, Puerto Rico
  15. 2.4 1 km SSE of Maria Antonia, 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.