QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

137 km NNE of Vieques, Puerto Rico

· 40 km deep · released about 120 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 2.4 (md)
Depth
40 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2573 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 120,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 86,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.7× the energy of this one
  4. This earthquake M 2.4 about 120 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 19.6100, -65.4333. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.4 Puerto Rico region
  2. 3.2 130 km NNE of Vieques, Puerto Rico
  3. 3.0 119 km N of Charlotte Amalie, U.S. Virgin Islands
  4. 3.1 95 km NNE of Luquillo, Puerto Rico
  5. 2.6 104 km N of Suárez, Puerto Rico
  6. 2.9 117 km NNE of Vieques, Puerto Rico
  7. 3.1 109 km NNE of Vieques, Puerto Rico
  8. 3.1 138 km N of Charlotte Amalie, U.S. Virgin Islands
  9. 3.1 133 km NNE of Vieques, Puerto Rico
  10. 3.2 137 km NNE of Vieques, Puerto Rico
  11. 2.5 138 km NNE of Suárez, Puerto Rico
  12. 2.8 126 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 3.3 126 km NNE of Vieques, Puerto Rico
  14. 3.2 104 km NNE of Suárez, Puerto Rico
  15. 3.1 113 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.9 on 2018-11-14 — it released about 5,400 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.