QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

120 km NNE of Vieques, Puerto Rico

· 40 km deep · released about 1.7 tons of TNT

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10 km30 km60 km120 km N Fajardo Municipio 116 km
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
40 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 116 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1299 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 6.7 100,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,200× 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 3.5× 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 19.4057, -65.3397. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 116 km (72 mi) NNE of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 122 km (76 mi) NNE of here earthquakes near Luquillo Municipio
Loíza Municipio, PR 124 km (77 mi) NNE of here earthquakes near Loíza Municipio
Río Grande Municipio, PR 124 km (77 mi) NNE of here earthquakes near Río Grande Municipio
Carolina Municipio, PR 130 km (81 mi) NNE of here earthquakes near Carolina Municipio
Canóvanas Municipio, PR 133 km (82 mi) NNE of here earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 3.7 135 km N of Suárez, Puerto Rico
  2. 3.4 134 km N of Suárez, Puerto Rico
  3. 3.7 141 km NNE of Vieques, Puerto Rico
  4. 4.0 122 km N of Suárez, Puerto Rico
  5. 3.8 124 km N of Suárez, Puerto Rico
  6. 3.6 125 km N of Suárez, Puerto Rico
  7. 4.0 135 km N of Suárez, Puerto Rico
  8. 3.9 113 km N of Suárez, Puerto Rico
  9. 3.2 127 km N of Suárez, Puerto Rico
  10. 3.8 134 km N of Su?rez, Puerto Rico
  11. 3.4 119 km N of Suárez, Puerto Rico
  12. 3.8 121 km N of Suárez, Puerto Rico
  13. 4.1 132 km N of Suárez, Puerto Rico
  14. 4.0 109 km N of Suárez, Puerto Rico
  15. 3.1 Puerto Rico region

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 200 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.