QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

3 km S of Maricao, Puerto Rico

· 29 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 6 kmSan Germán Municipio 7 kmSabana Grande Municipio 8 kmLas Marías Municipio 9 kmHormigueros Municipio 14 kmYauco Municipio 15 kmLares Municipio 19 kmLajas Municipio 20 kmSan Sebastián Municipio 21 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
29 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 6 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2701 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 18.1463, -66.9830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 6 km (4 mi) WSW of here earthquakes near Maricao Municipio
San Germán Municipio, PR 7 km (4 mi) NE of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 8 km (5 mi) NNW of here earthquakes near Sabana Grande Municipio
Las Marías Municipio, PR 9 km (6 mi) S of here earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 14 km (9 mi) E of here earthquakes near Hormigueros Municipio
Yauco Municipio, PR 15 km (9 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

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

  1. 1.8 4 km SW of Juncal, Puerto Rico
  2. 1.6 8 km NE of Sabana Grande, Puerto Rico
  3. 1.8 6 km ESE of Jayuya, Puerto Rico
  4. 1.9 6 km NW of Villalba, Puerto Rico
  5. 1.9 4 km SSW of Adjuntas, Puerto Rico
  6. 1.9 6 km SE of Maricao, Puerto Rico
  7. 2.1 23 km WNW of Puerto Real, Puerto Rico
  8. 2.0 4 km ENE of Las Marías, Puerto Rico
  9. 2.1 7 km SW of Mayagüez, Puerto Rico
  10. 2.2 7 km WSW of Mayagüez, Puerto Rico
  11. 2.4 6 km NNE of Hatillo, Puerto Rico
  12. 2.3 2 km NE of Rincón, Puerto Rico
  13. 2.1 6 km SE of Maricao, Puerto Rico
  14. 2.8 20 km SW of Stella, Puerto Rico
  15. 1.9 3 km ENE of Magas Arriba, 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.