QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

5 km ENE of Sabana Grande, Puerto Rico

· 21 km deep · released about 8.1 lb of TNT

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10 km30 km60 km120 km N Sabana Grande Municipio 4 kmYauco Municipio 5 kmMaricao Municipio 10 kmSan Germán Municipio 14 kmGuayanilla Municipio 15 kmGuánica Municipio 16 kmLas Marías Municipio 17 kmAdjuntas Municipio 19 kmLajas 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 1.6 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 4 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2631 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 18.0926, -66.9071. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sabana Grande Municipio, PR 4 km (3 mi) ENE of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 5 km (3 mi) W of here earthquakes near Yauco Municipio
Maricao Municipio, PR 10 km (6 mi) SSE of here earthquakes near Maricao Municipio
San Germán Municipio, PR 14 km (9 mi) E of here earthquakes near San Germán Municipio
Guayanilla Municipio, PR 15 km (9 mi) NW of here earthquakes near Guayanilla Municipio
Guánica Municipio, PR 16 km (10 mi) N of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 2.0 11 km SSW of Pole Ojea, Puerto Rico
  2. 1.6 Mona Passage
  3. 1.9 6 km NW of Adjuntas, Puerto Rico
  4. 1.8 7 km SW of La Playa, Puerto Rico
  5. 1.6 3 km N of Cabo Rojo, Puerto Rico
  6. 1.8 2 km NNW of Hormigueros, Puerto Rico
  7. 1.8 5 km SSW of Guánica, Puerto Rico
  8. 1.9 7 km S of Ponce, Puerto Rico
  9. 1.8 3 km E of La Parguera, Puerto Rico
  10. 2.3 12 km SSW of Tallaboa, Puerto Rico
  11. 2.0 2 km SSW of Adjuntas, Puerto Rico
  12. 1.8 8 km S of Potala Pastillo, Puerto Rico
  13. 1.9 3 km NE of San Germán, Puerto Rico
  14. 2.1 10 km W of Mayagüez, Puerto Rico
  15. 1.6 1 km SSW of Pole Ojea, 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.