QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

0 km SSW of Cayuco, Puerto Rico

· 23 km deep · released about 37 lb of TNT

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10 km30 km60 km120 km N Utuado Municipio 4 kmAdjuntas Municipio 12 kmLares Municipio 14 kmArecibo Municipio 18 kmJayuya Municipio 18 kmHatillo Municipio 18 kmFlorida Municipio 21 kmCamuy Municipio 22 kmCiales Municipio 24 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 2.1 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Utuado Municipio, 4 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3352 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 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 18.2850, -66.7411. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Utuado Municipio, PR 4 km (3 mi) WNW of here earthquakes near Utuado Municipio
Adjuntas Municipio, PR 12 km (7 mi) N of here earthquakes near Adjuntas Municipio
Lares Municipio, PR 14 km (8 mi) E of here earthquakes near Lares Municipio
Arecibo Municipio, PR 18 km (11 mi) SSW of here earthquakes near Arecibo Municipio
Jayuya Municipio, PR 18 km (11 mi) WNW of here earthquakes near Jayuya Municipio
Hatillo Municipio, PR 18 km (11 mi) SSE of here earthquakes near Hatillo Municipio

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

Aftershocks so far

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

  1. 1.7 3 km SSE of Monte Grande, Puerto Rico
  2. 1.8 4 km SSE of Maricao, Puerto Rico
  3. 2.2 0 km N of Magas Arriba, Puerto Rico
  4. 1.8 5 km SW of Mayagüez, Puerto Rico
  5. 2.7 6 km SSW of Corozal, Puerto Rico
  6. 3.1 5 km NE of Orocovis, Puerto Rico
  7. 2.4 2 km W of Aibonito, Puerto Rico
  8. 2.6 0 km WSW of Sabana Eneas, Puerto Rico
  9. 2.1 4 km E of Espino, Puerto Rico
  10. 2.6 14 km N of Quebradillas, Puerto Rico
  11. 3.0 6 km NW of Palomas, Puerto Rico
  12. 2.9 2 km NNE of Franquez, Puerto Rico
  13. 2.1 6 km ESE of Maricao, Puerto Rico
  14. 2.9 5 km N of Carrizales, Puerto Rico
  15. 2.8 7 km N of Tierras Nuevas Poniente, 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.