QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0Md

96 km NNW of San Antonio, Puerto Rico

· 61 km deep · released about 15 tons of TNT

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10 km30 km60 km120 km N Aguadilla Municipio 96 kmIsabela Municipio 102 kmAguada Municipio 106 kmRincón Municipio 108 kmQuebradillas Municipio 108 kmMoca Municipio 110 kmCamuy Municipio 114 kmAñasco Municipio 117 kmHatillo Municipio 118 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 4.0 (Md)
Depth
61 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 96 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3806 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

How big was it?

This earthquake released about 15 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 11,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 500× the energy of this one
  3. Magna, Utah 2020 M 5.7 350× the energy of this one
  4. This earthquake M 4.0 about 15 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 32× 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 19.2877, -67.4794. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguadilla Municipio, PR 96 km (60 mi) NNW of here earthquakes near Aguadilla Municipio
Isabela Municipio, PR 102 km (63 mi) NNW of here earthquakes near Isabela Municipio
Aguada Municipio, PR 106 km (66 mi) NNW of here earthquakes near Aguada Municipio
Rincón Municipio, PR 108 km (67 mi) NNW of here earthquakes near Rincón Municipio
Quebradillas Municipio, PR 108 km (67 mi) NNW of here earthquakes near Quebradillas Municipio
Moca Municipio, PR 110 km (68 mi) NNW of here earthquakes near Moca Municipio

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

Aftershocks so far

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

  1. 3.3 108 km NNW of San Antonio, Puerto Rico
  2. 2.2 63 km NW of San Antonio, Puerto Rico
  3. 3.1 Mona Passage
  4. 3.0 92 km NNW of San Antonio, Puerto Rico
  5. 3.1 79 km NNW of San Antonio, Puerto Rico
  6. 2.8 90 km N of San Antonio, Puerto Rico
  7. 3.2 74 km NNW of San Antonio, Puerto Rico
  8. 2.9 99 km NNW of San Antonio, Puerto Rico
  9. 3.4 90 km N of San Antonio, Puerto Rico
  10. 3.4 91 km N of San Antonio, Puerto Rico
  11. 3.2 85 km NNW of San Antonio, Puerto Rico
  12. 3.0 102 km NNW of San Antonio, Puerto Rico
  13. 3.0 90 km N of San Antonio, Puerto Rico
  14. 3.3 88 km N of San Antonio, Puerto Rico
  15. 2.6 93 km N of San Antonio, 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.