QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

1 km E of Capitanejo, Puerto Rico

· 41 km deep · released about 1,400 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Juana Díaz Municipio 3 kmPonce Municipio 10 kmVillalba Municipio 14 kmSanta Isabel Municipio 15 kmCoamo Municipio 20 kmPeñuelas Municipio 22 kmJayuya Municipio 23 kmOrocovis Municipio 24 kmSalinas Municipio 27 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
41 km below the surface
Felt
no reports yet
Nearest
Juana Díaz Municipio, 3 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 740 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 1,400 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 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× 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 18.0120, -66.5160. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Juana Díaz Municipio, PR 3 km (2 mi) WNW of here earthquakes near Juana Díaz Municipio
Ponce Municipio, PR 10 km (6 mi) E of here earthquakes near Ponce Municipio
Villalba Municipio, PR 14 km (9 mi) SSW of here earthquakes near Villalba Municipio
Santa Isabel Municipio, PR 15 km (9 mi) WNW of here earthquakes near Santa Isabel Municipio
Coamo Municipio, PR 20 km (12 mi) WSW of here earthquakes near Coamo Municipio
Peñuelas Municipio, PR 22 km (14 mi) E of here earthquakes near Peñuelas Municipio

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

Aftershocks so far

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

  1. 2.9 8 km SSE of Guánica, Puerto Rico
  2. 2.6 15 km SSE of Guánica, Puerto Rico
  3. 2.9 8 km SSE of Maria Antonia, Puerto Rico
  4. 2.8 7 km SSE of Maria Antonia, Puerto Rico
  5. 2.7 5 km SSW of Indios, Puerto Rico
  6. 2.0 4 km SW of Guánica, Puerto Rico
  7. 2.2 2 km N of Palomas, Puerto Rico
  8. 2.8 1 km SE of Naranjito, Puerto Rico
  9. 2.0 6 km NE of Sabana Grande, Puerto Rico
  10. 2.8 2 km NW of Indios, Puerto Rico
  11. 2.5 6 km E of La Parguera, Puerto Rico
  12. 2.5 2 km SSE of Indios, Puerto Rico
  13. 2.7 3 km SSE of Maria Antonia, Puerto Rico
  14. 2.3 2 km SSE of Magas Arriba, Puerto Rico
  15. 2.5 0 km N of Magas Arriba, 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 6.4 on 2020-01-07 — it released about 83,000 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.