QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

129 km NNE of Vieques, Puerto Rico

· 6.0 km deep · released about 1.3 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 3.3 (md)
Depth
6.0 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Toa Baja Municipio, 144 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1740 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 19.5295, -65.4275. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Baja Municipio, PR 144 km (89 mi) NE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 146 km (91 mi) NE of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 157 km (98 mi) NE of here earthquakes near Vega Baja Municipio
Barceloneta Municipio, PR 167 km (104 mi) NE of here earthquakes near Barceloneta Municipio

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

Aftershocks so far

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

  1. 3.8 118 km N of Suárez, Puerto Rico
  2. 3.3 110 km NNW of Charlotte Amalie, U.S. Virgin Islands
  3. 3.6 142 km N of Suárez, Puerto Rico
  4. 3.7 119 km N of Suárez, Puerto Rico
  5. 3.5 116 km NNE of Suárez, Puerto Rico
  6. 4.1 137 km N of Suárez, Puerto Rico
  7. 3.9 133 km NNE of San Juan, Puerto Rico
  8. 4.1 125 km N of Suárez, Puerto Rico
  9. 3.6 114 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 3.4 122 km NNW of Charlotte Amalie, U.S. Virgin Islands
  11. 3.3 116 km N of Charlotte Amalie, U.S. Virgin Islands
  12. 3.7 124 km N of Suárez, Puerto Rico
  13. 4.0 124 km N of Su?rez, Puerto Rico
  14. 3.9 140 km N of Suárez, Puerto Rico
  15. 3.8 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 250 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.