QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

85 km SW of Pole Ojea, Puerto Rico

· 42 km deep · released about 750 lb of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 65 kmCabo Rojo Municipio 88 kmLajas Municipio 98 kmHormigueros Municipio 103 kmSan Germán Municipio 107 kmGuánica Municipio 107 kmRincón Municipio 111 kmSabana Grande Municipio 113 kmAñasco Municipio 114 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 2.9 (md)
Depth
42 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 65 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1578 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 750 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 20,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 14,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.3× the energy of this one
  4. This earthquake M 2.9 about 750 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 17.5018, -67.8230. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 65 km (40 mi) S of here earthquakes near Mayagüez Municipio
Cabo Rojo Municipio, PR 88 km (54 mi) SW of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 98 km (61 mi) WSW of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 103 km (64 mi) SW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 107 km (67 mi) SW of here earthquakes near San Germán Municipio
Guánica Municipio, PR 107 km (67 mi) WSW of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 3.3 83 km SE of Boca de Yuma, Dominican Republic
  2. 4.7 106 km WSW of Pole Ojea, Puerto Rico
  3. 3.0 65 km SW of Pole Ojea, Puerto Rico
  4. 3.0 54 km SW of Pole Ojea, Puerto Rico
  5. 3.4 73 km W of Pole Ojea, Puerto Rico
  6. 3.4 83 km W of Pole Ojea, Puerto Rico
  7. 2.9 61 km SW of Pole Ojea, Puerto Rico
  8. 3.5 94 km SW of Pole Ojea, Puerto Rico
  9. 3.6 96 km SW of Pole Ojea, Puerto Rico
  10. 3.3 85 km SSE of Boca de Yuma, Dominican Republic
  11. 3.3 78 km SE of Boca de Yuma, Dominican Republic
  12. 4.3 102 km WSW of Pole Ojea, Puerto Rico
  13. 3.2 90 km WSW of Pole Ojea, Puerto Rico
  14. 3.1 95 km SW of Pole Ojea, Puerto Rico
  15. 3.4 83 km WSW 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.