QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

95 km SW of Pole Ojea, Puerto Rico

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mayagüez Municipio 73 kmCabo Rojo Municipio 98 kmLajas Municipio 108 kmHormigueros Municipio 113 kmGuánica Municipio 117 kmSan Germán Municipio 117 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
37 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 73 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 727 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 6.7 270,000× 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 8,500× 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 1.3× 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 17.4270, -67.8830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 73 km (45 mi) S of here earthquakes near Mayagüez Municipio
Cabo Rojo Municipio, PR 98 km (61 mi) SW of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 108 km (67 mi) SW of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 113 km (70 mi) SW of here earthquakes near Hormigueros Municipio
Guánica Municipio, PR 117 km (73 mi) WSW of here earthquakes near Guánica Municipio
San Germán Municipio, PR 117 km (73 mi) SW of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 3.3 64 km SW of Pole Ojea, Puerto Rico
  2. 3.7 110 km SW of Pole Ojea, Puerto Rico
  3. 3.4 105 km SW of Pole Ojea, Puerto Rico
  4. 3.4 86 km SW of Pole Ojea, Puerto Rico
  5. 3.3 83 km SE of Boca de Yuma, Dominican Republic
  6. 4.7 106 km WSW of Pole Ojea, Puerto Rico
  7. 3.4 89 km SSE of Boca de Yuma, Dominican Republic
  8. 3.0 65 km SW of Pole Ojea, Puerto Rico
  9. 3.9 123 km SSE of Boca de Yuma, Dominican Republic
  10. 3.0 54 km SW of Pole Ojea, Puerto Rico
  11. 3.4 83 km W of Pole Ojea, Puerto Rico
  12. 2.9 61 km SW of Pole Ojea, Puerto Rico
  13. 3.5 94 km SW of Pole Ojea, Puerto Rico
  14. 3.6 96 km SW of Pole Ojea, Puerto Rico
  15. 3.3 85 km SSE of Boca de Yuma, Dominican Republic

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.