QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

10 km WNW of Adjuntas, Puerto Rico

· 24 km deep · released about 12 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 7 kmYauco Municipio 11 kmLares Municipio 12 kmMaricao Municipio 12 kmUtuado Municipio 16 kmSabana Grande Municipio 17 kmLas Marías Municipio 17 kmGuayanilla Municipio 20 kmPeñuelas Municipio 20 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
24 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Adjuntas Municipio, 7 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2778 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 12 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 18.1821, -66.8208. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 7 km (4 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 12 km (7 mi) SSE of here earthquakes near Lares Municipio
Maricao Municipio, PR 12 km (8 mi) E of here earthquakes near Maricao Municipio
Utuado Municipio, PR 16 km (10 mi) SW of here earthquakes near Utuado Municipio
Sabana Grande Municipio, PR 17 km (11 mi) NE of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 2.5 2 km S of Las Marías, Puerto Rico
  2. 1.9 10 km SSE of Tallaboa, Puerto Rico
  3. 1.9 1 km S of Lajas, Puerto Rico
  4. 2.4 7 km NNW of Puerto Real, Puerto Rico
  5. 1.7 3 km WNW of Cabo Rojo, Puerto Rico
  6. 2.6 5 km W of Mayagüez, Puerto Rico
  7. 1.6 5 km WSW of Palmarejo, Puerto Rico
  8. 2.1 6 km N of San Sebastián, Puerto Rico
  9. 2.2 9 km SW of La Parguera, Puerto Rico
  10. 1.9 5 km W of Hormigueros, Puerto Rico
  11. 1.8 6 km E of Maricao, Puerto Rico
  12. 1.6 0 km SW of Boquerón, Puerto Rico
  13. 1.9 2 km N of Monte Grande, Puerto Rico
  14. 2.4 3 km SE of Hormigueros, Puerto Rico
  15. 1.6 1 km SW of Guánica, 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.