QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

1 km NNE of Sabana Grande, Puerto Rico

· 11 km deep · released about 6.2 lb of TNT

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10 km30 km60 km120 km N Sabana Grande Municipio 1 kmSan Germán Municipio 9 kmMaricao Municipio 10 kmYauco Municipio 10 kmLajas Municipio 15 kmGuánica Municipio 16 kmLas Marías Municipio 16 kmHormigueros Municipio 18 kmGuayanilla Municipio 19 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
11 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 1 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2653 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 6.2 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 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 18.0856, -66.9550. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sabana Grande Municipio, PR 1 km (0 mi) W of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 9 km (6 mi) ESE of here earthquakes near San Germán Municipio
Maricao Municipio, PR 10 km (6 mi) SSW of here earthquakes near Maricao Municipio
Yauco Municipio, PR 10 km (6 mi) W of here earthquakes near Yauco Municipio
Lajas Municipio, PR 15 km (9 mi) NE of here earthquakes near Lajas Municipio
Guánica Municipio, PR 16 km (10 mi) NNW of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 2.1 2 km E of Mayagüez, Puerto Rico
  2. 1.7 5 km NNE of Sabana Grande, Puerto Rico
  3. 1.8 4 km SSW of Añasco, Puerto Rico
  4. 1.9 6 km NW of Adjuntas, Puerto Rico
  5. 1.6 5 km NNE of Sabana Grande, Puerto Rico
  6. 2.4 5 km NNE of Sabana Grande, Puerto Rico
  7. 1.6 7 km ESE of Las Marías, Puerto Rico
  8. 2.0 8 km W of Maricao, Puerto Rico
  9. 2.0 8 km WSW of Guánica, Puerto Rico
  10. 1.6 6 km NNE of Ponce, Puerto Rico
  11. 1.5 6 km NE of Sabana Grande, Puerto Rico
  12. 1.9 6 km NNE of Sabana Grande, Puerto Rico
  13. 1.5 5 km SE of Boquerón, Puerto Rico
  14. 1.6 11 km SSW of Guánica, Puerto Rico
  15. 1.8 3 km WSW of Ponce, 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.