QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4Md

130 km NNW of Charlotte Amalie, U.S. Virgin Islands

· 70 km deep · released about 1.9 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
70 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 137 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3684 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 1.9 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 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4× 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 19.4820, -65.2300. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 137 km (85 mi) NNE of here earthquakes near Loíza Municipio
San Juan Municipio, PR 147 km (91 mi) NE of here earthquakes near San Juan Municipio
Cataño Municipio, PR 150 km (93 mi) NE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 152 km (95 mi) NE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 156 km (97 mi) NE of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 164 km (102 mi) NE of here earthquakes near Vega Alta Municipio

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

Aftershocks so far

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

  1. 2.8 143 km NNE of Vieques, Puerto Rico
  2. 2.9 110 km N of Charlotte Amalie, U.S. Virgin Islands
  3. 2.2 101 km N of Charlotte Amalie, U.S. Virgin Islands
  4. 2.5 83 km N of Charlotte Amalie, U.S. Virgin Islands
  5. 3.2 137 km NNE of Vieques, Puerto Rico
  6. 3.4 138 km NNE of Vieques, Puerto Rico
  7. 2.7 132 km NNE of Vieques, Puerto Rico
  8. 2.3 134 km NNE of Vieques, Puerto Rico
  9. 2.5 114 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 3.0 113 km NNE of Vieques, Puerto Rico
  11. 3.4 126 km NNW of Charlotte Amalie, U.S. Virgin Islands
  12. 3.1 138 km NNE of Vieques, Puerto Rico
  13. 2.6 143 km NNE of Vieques, Puerto Rico
  14. 2.4 117 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 3.0 90 km N of Culebra, Puerto Rico

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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.