QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

5 km SW of Sabana Grande, Puerto Rico

· 26 km deep · released about 5.9 lb of TNT

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10 km30 km60 km120 km N Sabana Grande Municipio 7 kmLajas Municipio 8 kmSan Germán Municipio 9 kmGuánica Municipio 13 kmYauco Municipio 16 kmMaricao Municipio 16 kmHormigueros Municipio 16 kmCabo Rojo Municipio 20 kmLas Marías Municipio 21 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
26 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 7 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2583 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 5.9 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 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 18.0401, -66.9981. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sabana Grande Municipio, PR 7 km (5 mi) SW of here earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 8 km (5 mi) NNE of here earthquakes near Lajas Municipio
San Germán Municipio, PR 9 km (5 mi) SSE of here earthquakes near San Germán Municipio
Guánica Municipio, PR 13 km (8 mi) NW of here earthquakes near Guánica Municipio
Yauco Municipio, PR 16 km (10 mi) WSW of here earthquakes near Yauco Municipio
Maricao Municipio, PR 16 km (10 mi) SSW of here earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 1.8 4 km ESE of Boquerón, Puerto Rico
  2. 1.6 10 km NW of Puerto Real, Puerto Rico
  3. 2.5 4 km SSE of Cacao, Puerto Rico
  4. 1.9 3 km SW of San Sebastián, Puerto Rico
  5. 2.0 7 km SW of Guánica, Puerto Rico
  6. 1.9 7 km WNW of Pole Ojea, Puerto Rico
  7. 2.3 10 km SW of Guánica, Puerto Rico
  8. 1.5 2 km E of Mayagüez, Puerto Rico
  9. 1.8 8 km ENE of Maricao, Puerto Rico
  10. 1.9 3 km SSW of Maricao, Puerto Rico
  11. 2.1 11 km NW of Puerto Real, Puerto Rico
  12. 2.1 3 km SW of Maricao, Puerto Rico
  13. 2.4 7 km E of Maricao, Puerto Rico
  14. 2.3 16 km SSW of Stella, Puerto Rico
  15. 2.3 26 km W of Puerto Real, 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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