QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

7 km WSW of Adjuntas, Puerto Rico

· 8.0 km deep · released about 11 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 6 kmYauco Municipio 9 kmPeñuelas Municipio 14 kmGuayanilla Municipio 15 kmMaricao Municipio 15 kmLares Municipio 17 kmUtuado Municipio 17 kmSabana Grande Municipio 17 kmLas Marías Municipio 22 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 1.7 (md)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 6 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2946 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 18.1403, -66.7935. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 6 km (4 mi) SW of here earthquakes near Adjuntas Municipio
Yauco Municipio, PR 9 km (6 mi) NE of here earthquakes near Yauco Municipio
Peñuelas Municipio, PR 14 km (9 mi) NNW of here earthquakes near Peñuelas Municipio
Guayanilla Municipio, PR 15 km (9 mi) N of here earthquakes near Guayanilla Municipio
Maricao Municipio, PR 15 km (10 mi) ESE of here earthquakes near Maricao Municipio
Lares Municipio, PR 17 km (11 mi) SSE of here earthquakes near Lares 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 1 km SSE of Adjuntas, Puerto Rico
  2. 1.9 3 km NE of Mayagüez, Puerto Rico
  3. 1.9 3 km SSE of Maricao, Puerto Rico
  4. 1.9 5 km N of Arecibo, Puerto Rico
  5. 1.8 5 km SW of Adjuntas, Puerto Rico
  6. 1.9 2 km S of Añasco, Puerto Rico
  7. 2.1 3 km SW of Las Marías, Puerto Rico
  8. 2.4 2 km S of San Sebastián, Puerto Rico
  9. 1.9 3 km W of Sabana Grande, Puerto Rico
  10. 2.0 7 km WNW of Mayagüez, Puerto Rico
  11. 2.0 9 km SSE of Indios, Puerto Rico
  12. 1.9 2 km SSW of Maricao, Puerto Rico
  13. 2.1 11 km SSW of Potala Pastillo, Puerto Rico
  14. 2.0 15 km SSW of Guánica, Puerto Rico
  15. 1.5 9 km SSE of Tallaboa, 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.