QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2Md

140 km NNE of Vieques, Puerto Rico

· 44 km deep · released about 1,900 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N
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 3.2 (Md)
Depth
44 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3456 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 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
  4. This earthquake M 3.2 about 1,900 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2× 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 19.6520, -65.4878. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.1 109 km N of Suárez, Puerto Rico
  2. 2.8 96 km NNE of Suárez, Puerto Rico
  3. 3.2 112 km NNE of Vieques, Puerto Rico
  4. 3.2 108 km NNE of Vieques, Puerto Rico
  5. 2.3 102 km NNE of Vieques, Puerto Rico
  6. 2.5 117 km NNW of Charlotte Amalie, U.S. Virgin Islands
  7. 3.3 130 km NNE of Vieques, Puerto Rico
  8. 2.9 133 km N of Culebra, Puerto Rico
  9. 2.3 131 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 2.6 122 km N of Culebra, Puerto Rico
  11. 3.1 115 km NNE of Vieques, Puerto Rico
  12. 3.2 104 km N of Loíza, Puerto Rico
  13. 3.4 139 km N of Charlotte Amalie, U.S. Virgin Islands
  14. 2.2 124 km NNW of Charlotte Amalie, U.S. Virgin Islands
  15. 3.2 114 km N of Suárez, 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.