QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

8 km W of Adjuntas, Puerto Rico

· 7.0 km deep · released about 8.7 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 5 kmYauco Municipio 11 kmLares Municipio 14 kmMaricao Municipio 14 kmUtuado Municipio 15 kmPeñuelas Municipio 18 kmSabana Grande Municipio 18 kmGuayanilla Municipio 19 kmLas Marías 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
7.0 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 5 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2566 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 8.7 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 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 18.1731, -66.8033. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 5 km (3 mi) W of here earthquakes near Adjuntas Municipio
Yauco Municipio, PR 11 km (7 mi) NNE of here earthquakes near Yauco Municipio
Lares Municipio, PR 14 km (8 mi) SSE of here earthquakes near Lares Municipio
Maricao Municipio, PR 14 km (9 mi) E of here earthquakes near Maricao Municipio
Utuado Municipio, PR 15 km (9 mi) SW of here earthquakes near Utuado Municipio
Peñuelas Municipio, PR 18 km (11 mi) NNW of here earthquakes near Peñuelas Municipio

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

Aftershocks so far

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

  1. 1.8 4 km WNW of Hormigueros, Puerto Rico
  2. 2.0 12 km S of Ponce, Puerto Rico
  3. 2.6 4 km NNE of Isabela, Puerto Rico
  4. 1.6 6 km WSW of Guánica, Puerto Rico
  5. 1.6 12 km SSE of Ponce, Puerto Rico
  6. 1.5 3 km WNW of Palmarejo, Puerto Rico
  7. 2.0 3 km SW of San Sebastián, Puerto Rico
  8. 2.2 7 km S of La Parguera, Puerto Rico
  9. 1.6 10 km SSW of Potala Pastillo, Puerto Rico
  10. 1.8 12 km SSE of Ponce, Puerto Rico
  11. 2.9 10 km NNW of Camuy, Puerto Rico
  12. 2.3 8 km SE of Tallaboa, Puerto Rico
  13. 1.8 1 km E of Lluveras, Puerto Rico
  14. 1.6 4 km ESE of Boquerón, Puerto Rico
  15. 2.0 1 km SE of Maricao, 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.