QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

129 km NNE of Vieques, Puerto Rico

· 64 km deep · released about 4.1 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 3.6 (md)
Depth
64 km below the surface
Felt
5 reports · strongest reported intensity V
Nearest
Toa Baja Municipio, 145 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2269 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 4.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 42,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,300× the energy of this one
  4. This earthquake M 3.6 about 4.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.5× 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 19.5261, -65.4046. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Baja Municipio, PR 145 km (90 mi) NE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 148 km (92 mi) NE of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 158 km (98 mi) NE of here earthquakes near Vega Baja Municipio

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

Aftershocks so far

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

  1. 3.4 101 km N of Culebra, Puerto Rico
  2. 3.2 102 km N of Charlotte Amalie, U.S. Virgin Islands
  3. 3.4 99 km N of Charlotte Amalie, U.S. Virgin Islands
  4. 3.2 97 km N of Charlotte Amalie, U.S. Virgin Islands
  5. 3.2 110 km N of Charlotte Amalie, U.S. Virgin Islands
  6. 3.4 104 km N of Charlotte Amalie, U.S. Virgin Islands
  7. 3.2 94 km N of Suárez, Puerto Rico
  8. 3.2 112 km N of Suárez, Puerto Rico
  9. 3.4 98 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 3.4 113 km N of Suárez, Puerto Rico
  11. 3.6 145 km NNE of Vieques, Puerto Rico
  12. 3.7 133 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 3.4 106 km NNW of Charlotte Amalie, U.S. Virgin Islands
  14. 2.9 84 km NNE of Luquillo, Puerto Rico
  15. 3.2 97 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 83 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.