QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7Md

97 km NE of Cruz Bay, U.S. Virgin Islands

· 45 km deep · released about 5.4 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 3.7 (Md)
Depth
45 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3655 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 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× 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 18.8412, -64.0410. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.4 78 km NE of Cruz Bay, U.S. Virgin Islands
  2. 2.4 77 km ENE of Cruz Bay, U.S. Virgin Islands
  3. 2.7 Virgin Islands
  4. 2.2 74 km NE of Cruz Bay, U.S. Virgin Islands
  5. 2.4 66 km NE of Cruz Bay, U.S. Virgin Islands
  6. 2.2 76 km NE of Cruz Bay, U.S. Virgin Islands
  7. 2.2 88 km NE of Cruz Bay, U.S. Virgin Islands
  8. 2.0 72 km ENE of Cruz Bay, U.S. Virgin Islands
  9. 2.0 70 km NE of Cruz Bay, U.S. Virgin Islands
  10. 2.6 77 km NE of Cruz Bay, U.S. Virgin Islands
  11. 2.7 78 km NE of Cruz Bay, U.S. Virgin Islands
  12. 2.1 78 km NE of Cruz Bay, U.S. Virgin Islands
  13. 2.8 78 km NE of Cruz Bay, U.S. Virgin Islands
  14. 3.1 72 km NE of Cruz Bay, U.S. Virgin Islands
  15. 2.2 50 km NE 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.

On USGS

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