QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

144 km NNE of Suárez, Puerto Rico

· 39 km deep · released about 720 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 2.9 (md)
Depth
39 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2712 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 720 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 21,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.3× the energy of this one
  4. This earthquake M 2.9 about 720 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 19.7008, -65.5401. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.4 137 km NNE of Vieques, Puerto Rico
  2. 3.2 129 km N of Culebra, Puerto Rico
  3. 3.4 150 km NNE of Vieques, Puerto Rico
  4. 3.3 111 km NNE of Suárez, Puerto Rico
  5. 3.2 112 km NNE of Suárez, Puerto Rico
  6. 3.6 144 km NNE of Vieques, Puerto Rico
  7. 2.7 115 km NNE of Vieques, Puerto Rico
  8. 2.9 134 km NNW of Charlotte Amalie, U.S. Virgin Islands
  9. 3.1 116 km NNE of Suárez, Puerto Rico
  10. 3.4 116 km NNE of Suárez, Puerto Rico
  11. 2.8 109 km N of Suárez, Puerto Rico
  12. 2.2 101 km N of Suárez, Puerto Rico
  13. 2.5 112 km NNE of Suárez, Puerto Rico
  14. 2.7 115 km NNE of Vieques, Puerto Rico
  15. 3.4 156 km N of Charlotte Amalie, U.S. Virgin Islands

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 930 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.