QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9Md

8 km NNE of Lluveras, Puerto Rico

· 8.0 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N Yauco Municipio 4 kmSabana Grande Municipio 7 kmMaricao Municipio 8 kmGuayanilla Municipio 15 kmAdjuntas Municipio 15 kmLas Marías Municipio 16 kmSan Germán Municipio 16 kmLares Municipio 18 kmGuánica 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 1.9 (Md)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Yauco Municipio, 4 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3467 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 18.1156, -66.8861. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yauco Municipio, PR 4 km (3 mi) NW of here earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 7 km (5 mi) ENE of here earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 8 km (5 mi) SE of here earthquakes near Maricao Municipio
Guayanilla Municipio, PR 15 km (10 mi) NW of here earthquakes near Guayanilla Municipio
Adjuntas Municipio, PR 15 km (10 mi) WSW of here earthquakes near Adjuntas Municipio
Las Marías Municipio, PR 16 km (10 mi) SE of here earthquakes near Las Marías Municipio

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

Aftershocks so far

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

  1. 2.3 11 km SSE of Guánica, Puerto Rico
  2. 2.1 3 km N of Monte Grande, Puerto Rico
  3. 2.4 1 km W of Palmarejo, Puerto Rico
  4. 1.6 9 km S of La Parguera, Puerto Rico
  5. 1.9 4 km NNW of Puerto Real, Puerto Rico
  6. 2.7 1 km ENE of Mayagüez, Puerto Rico
  7. 2.0 2 km WSW of Sabana Grande, Puerto Rico
  8. 2.3 3 km SSE of La Parguera, Puerto Rico
  9. 1.9 9 km SW of La Parguera, Puerto Rico
  10. 2.3 9 km SW of Guánica, Puerto Rico
  11. 1.6 3 km SW of Mayagüez, Puerto Rico
  12. 2.3 1 km NW of Liborio Negron Torres, Puerto Rico
  13. 1.8 19 km S of Guánica, Puerto Rico
  14. 1.6 5 km WSW of La Parguera, Puerto Rico
  15. 2.1 1 km ESE of Mayagüez, 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.