QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

4 km NE of Maricao, Puerto Rico

· 14 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 4 kmMaricao Municipio 4 kmLares Municipio 11 kmSabana Grande Municipio 14 kmSan Sebastián Municipio 14 kmSan Germán Municipio 14 kmYauco Municipio 17 kmHormigueros Municipio 19 kmAdjuntas Municipio 20 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 NW
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 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 18.2080, -66.9501. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 4 km (2 mi) SE of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 4 km (3 mi) NNW of here earthquakes near Maricao Municipio
Lares Municipio, PR 11 km (7 mi) SW of here earthquakes near Lares Municipio
Sabana Grande Municipio, PR 14 km (9 mi) N of here earthquakes near Sabana Grande Municipio
San Sebastián Municipio, PR 14 km (9 mi) S of here earthquakes near San Sebastián Municipio
San Germán Municipio, PR 14 km (9 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

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

  1. 1.9 19 km ESE of Puerto Real, Puerto Rico
  2. 2.4 Puerto Rico region
  3. 2.1 10 km SSE of Pole Ojea, Puerto Rico
  4. 2.8 8 km SSW of Stella, Puerto Rico
  5. 2.0 4 km SE of Ponce, Puerto Rico
  6. 2.6 7 km SW of La Playa, Puerto Rico
  7. 1.7 3 km ESE of Ponce, Puerto Rico
  8. 1.9 5 km ESE of Ponce, Puerto Rico
  9. 2.0 3 km S of Boquerón, Puerto Rico
  10. 2.0 8 km WSW of Adjuntas, Puerto Rico
  11. 2.9 12 km NNE of Isabela, Puerto Rico
  12. 2.4 1 km N of Puerto Real, Puerto Rico
  13. 1.8 Puerto Rico region
  14. 1.9 4 km ESE of Ponce, Puerto Rico
  15. 2.4 5 km SE of Ponce, 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.