QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

129 km N of Suárez, Puerto Rico

· 72 km deep · released about 2.1 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 3.4 (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 2693 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 2.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 80,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,500× the energy of this one
  4. This earthquake M 3.4 about 2.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.4× 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 19.5950, -65.7343. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.4 117 km NNE of Suárez, Puerto Rico
  2. 2.4 117 km NNE of Vieques, Puerto Rico
  3. 2.9 153 km NNE of Vieques, Puerto Rico
  4. 3.3 144 km NNE of Vieques, Puerto Rico
  5. 3.0 Puerto Rico region
  6. 2.6 141 km NNE of Vieques, Puerto Rico
  7. 3.3 142 km NNE of Vieques, Puerto Rico
  8. 3.2 142 km NNE of Vieques, Puerto Rico
  9. 2.7 103 km N of Suárez, Puerto Rico
  10. 2.5 117 km NNE of Vieques, Puerto Rico
  11. 3.0 133 km NNE of Vieques, Puerto Rico
  12. 3.1 147 km NNE of Vieques, Puerto Rico
  13. 2.7 103 km N of San Juan, Puerto Rico
  14. 2.4 137 km NNE of Vieques, Puerto Rico
  15. 4.0 121 km N of San Juan, 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

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