QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

7 km NE of Sabana Grande, Puerto Rico

· 5.0 km deep · released about 17 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 6 kmSabana Grande Municipio 6 kmYauco Municipio 8 kmSan Germán Municipio 13 kmLas Marías Municipio 13 kmLares Municipio 17 kmAdjuntas Municipio 18 kmGuayanilla Municipio 19 kmGuánica 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 1.8 (md)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 6 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2670 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 17 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 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 18.1270, -66.9188. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 6 km (3 mi) SSE of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 6 km (3 mi) NNE of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 8 km (5 mi) NW of here earthquakes near Yauco Municipio
San Germán Municipio, PR 13 km (8 mi) E of here earthquakes near San Germán Municipio
Las Marías Municipio, PR 13 km (8 mi) SSE of here earthquakes near Las Marías Municipio
Lares Municipio, PR 17 km (11 mi) SSW of here earthquakes near Lares Municipio

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

Aftershocks so far

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

  1. 1.8 6 km NNE of Sabana Grande, Puerto Rico
  2. 1.7 4 km SSW of Liborio Negron Torres, Puerto Rico
  3. 1.8 1 km S of La Parguera, Puerto Rico
  4. 1.7 2 km SSW of La Parguera, Puerto Rico
  5. 1.8 3 km SSE of La Parguera, Puerto Rico
  6. 1.9 4 km WNW of San Sebastián, Puerto Rico
  7. 1.9 4 km SE of Piedra Gorda, Puerto Rico
  8. 1.5 2 km NW of Sabana Grande, Puerto Rico
  9. 1.9 5 km E of Maricao, Puerto Rico
  10. 1.8 2 km N of Sabana Grande, Puerto Rico
  11. 1.5 1 km NNE of Sabana Grande, Puerto Rico
  12. 1.9 Puerto Rico region
  13. 1.8 2 km WNW of Hormigueros, Puerto Rico
  14. 1.8 7 km NNW of Villalba, Puerto Rico
  15. 1.8 4 km SE of La Parguera, 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.