QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

4 km W of Cayuco, Puerto Rico

· 9.0 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N Utuado Municipio 9 kmLares Municipio 9 kmAdjuntas Municipio 13 kmHatillo Municipio 16 kmCamuy Municipio 19 kmArecibo Municipio 19 kmSan Sebastián Municipio 20 kmMaricao Municipio 21 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 1.9 (md)
Depth
9.0 km below the surface
Felt
no reports yet
Nearest
Utuado Municipio, 9 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2713 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 18.2945, -66.7820. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Utuado Municipio, PR 9 km (5 mi) WNW of here earthquakes near Utuado Municipio
Lares Municipio, PR 9 km (6 mi) ENE of here earthquakes near Lares Municipio
Adjuntas Municipio, PR 13 km (8 mi) NNW of here earthquakes near Adjuntas Municipio
Hatillo Municipio, PR 16 km (10 mi) S of here earthquakes near Hatillo Municipio
Camuy Municipio, PR 19 km (12 mi) SSE of here earthquakes near Camuy Municipio
Arecibo Municipio, PR 19 km (12 mi) SW of here earthquakes near Arecibo Municipio

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

Aftershocks so far

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

  1. 1.6 5 km ESE of Boquerón, Puerto Rico
  2. 1.8 10 km SSW of Guánica, Puerto Rico
  3. 2.5 5 km ESE of Piedra Gorda, Puerto Rico
  4. 1.8 4 km W of Capitanejo, Puerto Rico
  5. 2.1 1 km N of Aguilita, Puerto Rico
  6. 2.1 0 km E of Yauco, Puerto Rico
  7. 1.5 3 km W of Palmarejo, Puerto Rico
  8. 1.6 5 km S of Piedra Gorda, Puerto Rico
  9. 1.8 3 km N of Yauco, Puerto Rico
  10. 1.7 2 km E of Hormigueros, Puerto Rico
  11. 1.5 5 km SE of Adjuntas, Puerto Rico
  12. 2.4 8 km N of San Antonio, Puerto Rico
  13. 1.7 8 km W of Mayagüez, Puerto Rico
  14. 2.0 8 km NE of Tierras Nuevas Poniente, Puerto Rico
  15. 1.6 7 km NE of Sabana Grande, 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.