QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

1 km NNW of Boquerón, Puerto Rico

· 12 km deep · released about 16 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 5 kmHormigueros Municipio 12 kmLajas Municipio 16 kmSan Germán Municipio 16 kmSabana Grande Municipio 24 kmAñasco Municipio 28 kmGuánica Municipio 28 kmMaricao Municipio 29 kmLas Marías Municipio 30 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 1.8 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 5 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2655 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 18.0386, -67.1740. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 5 km (3 mi) N of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 12 km (8 mi) SSW of here earthquakes near Hormigueros Municipio
Lajas Municipio, PR 16 km (10 mi) WNW of here earthquakes near Lajas Municipio
San Germán Municipio, PR 16 km (10 mi) WSW of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 24 km (15 mi) WSW of here earthquakes near Sabana Grande Municipio
Añasco Municipio, PR 28 km (17 mi) S of here earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 2.3 3 km ENE of Espino, Puerto Rico
  2. 1.9 8 km N of Yauco, Puerto Rico
  3. 1.5 22 km W of Pole Ojea, Puerto Rico
  4. 2.1 2 km E of Mayagüez, Puerto Rico
  5. 1.7 5 km NNE of Sabana Grande, Puerto Rico
  6. 1.8 4 km SSW of Añasco, Puerto Rico
  7. 1.9 6 km NW of Adjuntas, Puerto Rico
  8. 1.6 5 km NNE of Sabana Grande, Puerto Rico
  9. 2.4 5 km NNE of Sabana Grande, Puerto Rico
  10. 1.6 7 km ESE of Las Marías, Puerto Rico
  11. 2.0 8 km W of Maricao, Puerto Rico
  12. 2.0 8 km WSW of Guánica, Puerto Rico
  13. 1.9 41 km WSW of Pole Ojea, Puerto Rico
  14. 1.5 6 km NE of Sabana Grande, Puerto Rico
  15. 1.9 6 km NNE of Sabana Grande, 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.