QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1md

125 km N of Suárez, Puerto Rico

· 74 km deep · released about 20 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 4.1 (md)
Depth
74 km below the surface
Felt
1 report · strongest reported intensity II
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1324 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 20 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 8,500× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 380× the energy of this one
  3. Magna, Utah 2020 M 5.7 270× the energy of this one
  4. This earthquake M 4.1 about 20 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 42× 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 19.5621, -65.7326. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.4 Puerto Rico region
  2. 3.9 138 km N of Suárez, Puerto Rico
  3. 3.3 82 km NNE of Suárez, Puerto Rico
  4. 3.3 86 km NNE of Suárez, Puerto Rico
  5. 3.6 137 km NNE of Vieques, Puerto Rico
  6. 3.4 Puerto Rico region
  7. 3.4 120 km NNE of Vieques, Puerto Rico
  8. 3.4 145 km NNE of Vieques, Puerto Rico
  9. 3.7 133 km NNE of Vieques, Puerto Rico
  10. 3.4 146 km NNE of Vieques, Puerto Rico
  11. 3.9 134 km NNE of Vieques, Puerto Rico
  12. 4.0 120 km NNE of Vieques, Puerto Rico
  13. 3.9 Puerto Rico region
  14. 3.3 131 km NNE of Vieques, Puerto Rico
  15. 3.5 132 km NNE of Vieques, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2022-11-07.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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