QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5Md

3 km NW of Hormigueros, Puerto Rico

· 23 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 5 kmSan Germán Municipio 14 kmAñasco Municipio 14 kmCabo Rojo Municipio 18 kmLas Marías Municipio 20 kmRincón Municipio 22 kmMaricao Municipio 23 kmSabana Grande Municipio 24 kmLajas Municipio 24 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 1.5 (Md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3781 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 18.1615, -67.1565. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 5 km (3 mi) NW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 14 km (9 mi) WNW of here earthquakes near San Germán Municipio
Añasco Municipio, PR 14 km (9 mi) S of here earthquakes near Añasco Municipio
Cabo Rojo Municipio, PR 18 km (11 mi) N of here earthquakes near Cabo Rojo Municipio
Las Marías Municipio, PR 20 km (13 mi) WSW of here earthquakes near Las Marías Municipio
Rincón Municipio, PR 22 km (14 mi) SSE of here earthquakes near Rincón Municipio

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

Aftershocks so far

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

  1. 2.4 6 km N of San Germán, Puerto Rico
  2. 1.8 5 km E of Espino, Puerto Rico
  3. 2.1 12 km SSW of Guánica, Puerto Rico
  4. 2.5 4 km S of Indios, Puerto Rico
  5. 2.6 5 km SW of Liborio Negron Torres, Puerto Rico
  6. 1.6 13 km SSW of La Parguera, Puerto Rico
  7. 1.6 13 km S of Pole Ojea, Puerto Rico
  8. 1.7 16 km NW of Rincón, Puerto Rico
  9. 2.2 6 km WSW of Maricao, Puerto Rico
  10. 1.9 Puerto Rico region
  11. 1.9 6 km NNW of Isabela, Puerto Rico
  12. 3.3 22 km NW of Aguadilla, Puerto Rico
  13. 1.8 6 km WNW of Las Marías, Puerto Rico
  14. 2.0 18 km W of Puerto Real, Puerto Rico
  15. 3.0 10 km N of San Antonio, 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.