QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

5 km SSW of Maricao, Puerto Rico

· 20 km deep · released about 46 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 5 kmSabana Grande Municipio 8 kmMaricao Municipio 8 kmLas Marías Municipio 11 kmHormigueros Municipio 12 kmYauco Municipio 16 kmLajas Municipio 18 kmLares Municipio 21 kmGuánica 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
20 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 5 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3313 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 46 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 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 18.1311, -66.9995. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 5 km (3 mi) ENE of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 8 km (5 mi) NW of here earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 8 km (5 mi) SW of here earthquakes near Maricao Municipio
Las Marías Municipio, PR 11 km (7 mi) SSW of here earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 12 km (8 mi) E of here earthquakes near Hormigueros Municipio
Yauco Municipio, PR 16 km (10 mi) WNW of here earthquakes near Yauco Municipio

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

Aftershocks so far

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

  1. 2.7 6 km SE of Espino, Puerto Rico
  2. 2.0 1 km WNW of Lluveras, Puerto Rico
  3. 2.1 5 km WSW of Rincón, Puerto Rico
  4. 2.2 7 km WSW of La Playa, Puerto Rico
  5. 3.0 16 km WSW of Stella, Puerto Rico
  6. 2.9 2 km NNW of Boquerón, Puerto Rico
  7. 2.1 0 km NNW of Hormigueros, Puerto Rico
  8. 1.6 7 km W of La Parguera, Puerto Rico
  9. 2.9 4 km WSW of Las Marías, Puerto Rico
  10. 1.6 Mona Passage
  11. 2.1 7 km SE of Maricao, Puerto Rico
  12. 1.7 10 km ESE of Maricao, Puerto Rico
  13. 1.8 3 km NW of Fuig, Puerto Rico
  14. 2.0 4 km W of Palmarejo, Puerto Rico
  15. 2.4 5 km WNW of Aguada, 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.