QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

122 km N of Charlotte Amalie, U.S. Virgin Islands

· 99 km deep · released about 800 lb 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 3.0 (md)
Depth
99 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 137 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2459 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 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 lb of TNT

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 19.4523, -64.9410. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 137 km (85 mi) NNE of here earthquakes near Fajardo Municipio
Río Grande Municipio, PR 150 km (93 mi) NE of here earthquakes near Río Grande Municipio
Loíza Municipio, PR 154 km (96 mi) NE of here earthquakes near Loíza Municipio
Carolina Municipio, PR 160 km (99 mi) NE of here earthquakes near Carolina Municipio
San Juan Municipio, PR 165 km (102 mi) NE of here earthquakes near San Juan Municipio

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

Aftershocks so far

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

  1. 3.4 74 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 3.6 Virgin Islands
  3. 3.7 113 km N of Charlotte Amalie, U.S. Virgin Islands
  4. 3.1 123 km N of Culebra, Puerto Rico
  5. 3.3 113 km N of Culebra, Puerto Rico
  6. 3.6 120 km N of Cruz Bay, U.S. Virgin Islands
  7. 3.6 127 km N of Charlotte Amalie, U.S. Virgin Islands
  8. 3.6 151 km N of Charlotte Amalie, U.S. Virgin Islands
  9. 3.7 143 km N of Charlotte Amalie, U.S. Virgin Islands
  10. 3.7 112 km NNE of Cruz Bay, U.S. Virgin Islands
  11. 3.4 95 km N of Culebra, Puerto Rico
  12. 3.4 Virgin Islands
  13. 3.3 126 km N of Cruz Bay, U.S. Virgin Islands
  14. 3.4 130 km NNE of Cruz Bay, U.S. Virgin Islands
  15. 3.6 137 km NNE of Cruz Bay, 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 5.0 on 2019-10-06 — it released about 1,000 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.