QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

158 km NNE of Suárez, Puerto Rico

· 88 km deep · released about 1.3 tons 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 3.3 (md)
Depth
88 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2837 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 1.3 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 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,100× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.7× 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 19.8203, -65.4956. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.2 173 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 3.3 121 km NNE of Suárez, Puerto Rico
  3. 2.7 118 km N of Suárez, Puerto Rico
  4. 3.0 133 km NNW of Charlotte Amalie, U.S. Virgin Islands
  5. 3.1 134 km N of Charlotte Amalie, U.S. Virgin Islands
  6. 3.2 147 km N of Charlotte Amalie, U.S. Virgin Islands
  7. 3.4 141 km NNE of Vieques, Puerto Rico
  8. 3.2 126 km NNE of Vieques, Puerto Rico
  9. 3.2 141 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 3.4 146 km NNE of Vieques, Puerto Rico
  11. 3.4 153 km NNE of Vieques, Puerto Rico
  12. 3.2 124 km NNE of Vieques, Puerto Rico
  13. 2.9 127 km NNE of Suárez, Puerto Rico
  14. 3.4 129 km N of Suárez, Puerto Rico
  15. 3.1 127 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.