QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

141 km NNE of Vieques, Puerto Rico

· 72 km deep · released about 950 lb of TNT

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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 3.0 (md)
Depth
72 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3586 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 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 19.5833, -65.2740. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 4.2 112 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 3.0 104 km N of Culebra, Puerto Rico
  3. 3.5 124 km N of Charlotte Amalie, U.S. Virgin Islands
  4. 2.4 112 km N of Charlotte Amalie, U.S. Virgin Islands
  5. 2.7 110 km N of Charlotte Amalie, U.S. Virgin Islands
  6. 3.9 118 km NNE of Vieques, Puerto Rico
  7. 3.4 129 km NNE of Suárez, Puerto Rico
  8. 2.9 105 km NNE of Vieques, Puerto Rico
  9. 2.7 94 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 3.6 121 km N of Charlotte Amalie, U.S. Virgin Islands
  11. 2.4 126 km NNE of Vieques, Puerto Rico
  12. 3.1 145 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 3.1 102 km N of Charlotte Amalie, U.S. Virgin Islands
  14. 3.2 120 km NNW of Charlotte Amalie, U.S. Virgin Islands
  15. 2.7 130 km NNE of Vieques, 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.