QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

135 km NNE of Vieques, Puerto Rico

· 79 km deep · released about 1.7 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
79 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 156 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2867 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 1.7 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 99,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,100× the energy of this one
  4. This earthquake M 3.4 about 1.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.6× 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 19.5481, -65.3138. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 156 km (97 mi) NE of here earthquakes near Dorado Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.3 102 km NNE of Vieques, Puerto Rico
  2. 3.4 160 km NNE of Vieques, Puerto Rico
  3. 3.2 109 km N of Charlotte Amalie, U.S. Virgin Islands
  4. 3.0 113 km N of Charlotte Amalie, U.S. Virgin Islands
  5. 3.2 105 km N of Charlotte Amalie, U.S. Virgin Islands
  6. 3.0 96 km N of Charlotte Amalie, U.S. Virgin Islands
  7. 2.8 129 km NNE of Vieques, Puerto Rico
  8. 3.1 Puerto Rico region
  9. 2.8 113 km NNE of Vieques, Puerto Rico
  10. 3.2 140 km NNW of Charlotte Amalie, U.S. Virgin Islands
  11. 2.7 89 km NNE of Vieques, Puerto Rico
  12. 3.3 123 km NNE of Suárez, Puerto Rico
  13. 3.3 98 km NNE of Vieques, Puerto Rico
  14. 2.7 87 km NNE of Vieques, Puerto Rico
  15. 3.1 107 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 4.5 on 2018-03-06 — it released about 50 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.