QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

6 km NNW of Yaurel, Puerto Rico

· 7.9 km deep · released about 1,300 lb of TNT

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10 km30 km60 km120 km N Cayey Municipio 8 kmArroyo Municipio 12 kmGuayama Municipio 12 kmPatillas Municipio 13 kmCidra Municipio 14 kmSan Lorenzo Municipio 14 kmCaguas Municipio 16 kmAibonito Municipio 20 kmAguas Buenas Municipio 21 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 3.1 (md)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 8 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 776 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 260,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,200× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 18.0745, -66.0860. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 8 km (5 mi) ESE of here earthquakes near Cayey Municipio
Arroyo Municipio, PR 12 km (8 mi) NNW of here earthquakes near Arroyo Municipio
Guayama Municipio, PR 12 km (8 mi) NNE of here earthquakes near Guayama Municipio
Patillas Municipio, PR 13 km (8 mi) NW of here earthquakes near Patillas Municipio
Cidra Municipio, PR 14 km (9 mi) SE of here earthquakes near Cidra Municipio
San Lorenzo Municipio, PR 14 km (9 mi) SW of here earthquakes near San Lorenzo Municipio

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

Aftershocks so far

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

  1. 3.4 4 km SE of G. L. Garcia, Puerto Rico
  2. 2.2 4 km NW of Orocovis, Puerto Rico
  3. 2.8 4 km WNW of Candelero Arriba, Puerto Rico
  4. 2.3 4 km SSE of Salinas, Puerto Rico
  5. 2.0 3 km E of Santa Clara, Puerto Rico
  6. 2.5 18 km S of Lamboglia, Puerto Rico
  7. 3.0 18 km S of Lamboglia, Puerto Rico
  8. 2.1 24 km S of Lamboglia, Puerto Rico
  9. 2.9 13 km SW of Santa Isabel, Puerto Rico
  10. 2.3 29 km S of Central Aguirre, Puerto Rico
  11. 1.9 2 km W of Potala Pastillo, Puerto Rico
  12. 2.2 2 km E of Cayey, Puerto Rico
  13. 2.0 4 km NNW of Jobos, Puerto Rico
  14. 2.3 11 km SSE of Arroyo, Puerto Rico
  15. 2.5 5 km NNW of Jagual, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2016-12-05 — it released about 180 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.