QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

4 km SW of Las Marías, Puerto Rico

· 26 km deep · released about 49 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 4 kmMaricao Municipio 10 kmSan Germán Municipio 13 kmSan Sebastián Municipio 13 kmAñasco Municipio 14 kmHormigueros Municipio 14 kmLares Municipio 17 kmSabana Grande Municipio 17 kmMoca Municipio 19 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
26 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 4 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3304 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 49 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 5.8 310,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 220,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 49 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 18.2211, -67.0151. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 4 km (3 mi) W of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 10 km (6 mi) WNW of here earthquakes near Maricao Municipio
San Germán Municipio, PR 13 km (8 mi) N of here earthquakes near San Germán Municipio
San Sebastián Municipio, PR 13 km (8 mi) SSW of here earthquakes near San Sebastián Municipio
Añasco Municipio, PR 14 km (9 mi) ESE of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 14 km (9 mi) NE of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 2.1 4 km ESE of Las Marías, Puerto Rico
  2. 1.8 2 km SSW of Palmarejo, Puerto Rico
  3. 1.9 8 km SSE of Pole Ojea, Puerto Rico
  4. 2.1 9 km S of Pole Ojea, Puerto Rico
  5. 2.3 22 km W of Puerto Real, Puerto Rico
  6. 3.1 4 km NNE of Hatillo, Puerto Rico
  7. 2.7 6 km SE of Espino, Puerto Rico
  8. 2.0 1 km WNW of Lluveras, Puerto Rico
  9. 2.1 5 km WSW of Rincón, Puerto Rico
  10. 2.2 7 km WSW of La Playa, Puerto Rico
  11. 2.7 12 km NW of San Antonio, Puerto Rico
  12. 3.0 16 km WSW of Stella, Puerto Rico
  13. 2.9 2 km NNW of Boquerón, Puerto Rico
  14. 2.1 0 km NNW of Hormigueros, Puerto Rico
  15. 1.6 7 km W 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.