QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7md

131 km NNE of Vieques, Puerto Rico

· 90 km deep · released about 5.5 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
90 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 136 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 656 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 5.5 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 31,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 970× the energy of this one
  4. This earthquake M 3.7 about 5.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 12× 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 19.5081, -65.3105. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 136 km (84 mi) NNE of here earthquakes near Loíza Municipio
Cataño Municipio, PR 147 km (92 mi) NE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 149 km (93 mi) NE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 152 km (95 mi) NE of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 161 km (100 mi) NE of here earthquakes near Vega Alta Municipio
Vega Baja Municipio, PR 164 km (102 mi) NE of here earthquakes near Vega Baja Municipio

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

Aftershocks so far

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

  1. 3.2 92 km NNW of Charlotte Amalie, U.S. Virgin Islands
  2. 3.4 114 km N of Suárez, Puerto Rico
  3. 3.4 140 km NNE of Vieques, Puerto Rico
  4. 3.7 131 km NNE of Vieques, Puerto Rico
  5. 3.3 133 km NNE of Vieques, Puerto Rico
  6. 3.4 130 km NNE of Vieques, Puerto Rico
  7. 3.8 141 km NNE of Vieques, Puerto Rico
  8. 3.7 137 km NNE of Vieques, Puerto Rico
  9. 3.8 121 km NNE of Vieques, Puerto Rico
  10. 4.0 143 km NNE of Vieques, Puerto Rico
  11. 3.7 133 km NNE of Vieques, Puerto Rico
  12. 3.4 106 km NNE of Vieques, Puerto Rico
  13. 3.3 84 km N of Culebra, Puerto Rico
  14. 3.3 85 km N of Culebra, Puerto Rico
  15. 3.3 99 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.9 on 2018-11-14 — it released about 61 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.