QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9Md

3 km ESE of Las Marías, Puerto Rico

· 20 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 2 kmMaricao Municipio 7 kmSan Sebastián Municipio 11 kmLares Municipio 11 kmSan Germán Municipio 16 kmSabana Grande Municipio 17 kmAñasco Municipio 19 kmHormigueros Municipio 20 kmYauco 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 1.9 (Md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 2 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3585 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 18.2343, -66.9636. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 2 km (1 mi) ENE of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 7 km (5 mi) NNW of here earthquakes near Maricao Municipio
San Sebastián Municipio, PR 11 km (7 mi) S of here earthquakes near San Sebastián Municipio
Lares Municipio, PR 11 km (7 mi) WSW of here earthquakes near Lares Municipio
San Germán Municipio, PR 16 km (10 mi) NNE of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 17 km (10 mi) N of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 1.9 7 km SE of Pole Ojea, Puerto Rico
  2. 2.4 12 km NNE of Arecibo, Puerto Rico
  3. 1.6 5 km W of Hormigueros, Puerto Rico
  4. 2.7 11 km S of Pole Ojea, Puerto Rico
  5. 2.0 2 km SSE of Magas Arriba, Puerto Rico
  6. 2.4 10 km N of Quebradillas, Puerto Rico
  7. 1.8 4 km WNW of Mayagüez, Puerto Rico
  8. 1.9 15 km S of Guánica, Puerto Rico
  9. 2.1 5 km NNE of Sabana Eneas, Puerto Rico
  10. 2.4 4 km NW of Rincón, Puerto Rico
  11. 2.5 0 km S of Hormigueros, Puerto Rico
  12. 2.0 11 km SSE of Pole Ojea, Puerto Rico
  13. 2.2 8 km SW of La Parguera, Puerto Rico
  14. 2.0 7 km WNW of Puerto Real, Puerto Rico
  15. 2.6 13 km NW of Rincón, 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.