QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

100 km SSW of Pole Ojea, Puerto Rico

· 7.0 km deep · released about 1.6 tons of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 103 kmMayagüez Municipio 108 kmLajas Municipio 109 kmGuánica Municipio 113 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 3.4 (md)
Depth
7.0 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 103 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2063 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 1.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 110,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,300× the energy of this one
  4. This earthquake M 3.4 about 1.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.3× 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 17.1538, -67.5893. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 103 km (64 mi) SSW of here earthquakes near Cabo Rojo Municipio
Mayagüez Municipio, PR 108 km (67 mi) SSE of here earthquakes near Mayagüez Municipio
Lajas Municipio, PR 109 km (67 mi) SSW of here earthquakes near Lajas Municipio
Guánica Municipio, PR 113 km (70 mi) SW of here earthquakes near Guánica Municipio
Hormigueros Municipio, PR 120 km (75 mi) SSW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 121 km (75 mi) SSW 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

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

  1. 3.4 105 km SW of Pole Ojea, Puerto Rico
  2. 3.2 94 km SSW of Pole Ojea, Puerto Rico
  3. 3.4 86 km SW of Pole Ojea, Puerto Rico
  4. 3.0 65 km SW of Pole Ojea, Puerto Rico
  5. 3.0 83 km SSW of Pole Ojea, Puerto Rico
  6. 3.5 94 km SW of Pole Ojea, Puerto Rico
  7. 3.6 96 km SW of Pole Ojea, Puerto Rico
  8. 3.1 95 km SW of Pole Ojea, Puerto Rico
  9. 3.0 120 km SSW of Pole Ojea, Puerto Rico
  10. 3.1 56 km SSW of Pole Ojea, Puerto Rico
  11. 3.9 98 km SW of Pole Ojea, Puerto Rico
  12. 3.4 127 km SW of Pole Ojea, Puerto Rico
  13. 3.2 59 km SSW of Pole Ojea, Puerto Rico
  14. 3.2 73 km SW of Pole Ojea, Puerto Rico
  15. 3.6 106 km SW of Pole Ojea, 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.