QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

3 km SSW of Monte Grande, Puerto Rico

· 37 km deep · released about 8.1 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 9 kmCabo Rojo Municipio 9 kmSan Germán Municipio 10 kmLajas Municipio 12 kmSabana Grande Municipio 18 kmMaricao Municipio 23 kmGuánica Municipio 24 kmLas Marías Municipio 24 kmAñasco Municipio 26 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 1.6 (md)
Depth
37 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 9 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3013 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 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 8.1 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 18.0555, -67.1185. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 9 km (5 mi) S of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 9 km (6 mi) NE of here earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 10 km (6 mi) SW of here earthquakes near San Germán Municipio
Lajas Municipio, PR 12 km (7 mi) NW of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 18 km (11 mi) W of here earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 23 km (15 mi) SW of here earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 1.6 10 km SSE of La Parguera, Puerto Rico
  2. 2.5 19 km W of Rincón, Puerto Rico
  3. 1.6 18 km SSW of Guánica, Puerto Rico
  4. 2.0 4 km SSW of Añasco, Puerto Rico
  5. 1.9 2 km WNW of Guayanilla, Puerto Rico
  6. 2.0 3 km N of Puerto Real, Puerto Rico
  7. 1.9 12 km W of Pole Ojea, Puerto Rico
  8. 1.9 6 km W of Las Marías, Puerto Rico
  9. 2.4 Puerto Rico region
  10. 1.8 4 km NE of La Parguera, Puerto Rico
  11. 2.7 18 km SSE of Guánica, Puerto Rico
  12. 2.2 25 km S of Guánica, Puerto Rico
  13. 2.1 Puerto Rico region
  14. 2.2 6 km NNE of Sabana Grande, Puerto Rico
  15. 2.1 11 km SSE of Lares, 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

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