QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7md

128 km N of Culebra, Puerto Rico

· 63 km deep · released about 5.9 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 3.7 (md)
Depth
63 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 134 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 673 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 5.9 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 29,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 900× the energy of this one
  4. This earthquake M 3.7 about 5.9 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 19.4645, -65.2691. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 134 km (83 mi) NNE of here earthquakes near Loíza Municipio
Carolina Municipio, PR 140 km (87 mi) NNE of here earthquakes near Carolina Municipio
San Juan Municipio, PR 143 km (89 mi) NE of here earthquakes near San Juan Municipio
Cataño Municipio, PR 146 km (91 mi) NE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 148 km (92 mi) NE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 152 km (94 mi) NE of here earthquakes near Dorado Municipio

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

Aftershocks so far

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

  1. 3.4 109 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 3.6 125 km NNE of Vieques, Puerto Rico
  3. 4.3 144 km NNE of Vieques, Puerto Rico
  4. 4.0 139 km NNE of Vieques, Puerto Rico
  5. 4.0 136 km NNW of Charlotte Amalie, U.S. Virgin Islands
  6. 3.4 112 km N of Suárez, Puerto Rico
  7. 3.4 151 km NNE of Vieques, Puerto Rico
  8. 3.8 134 km NNE of Vieques, Puerto Rico
  9. 3.6 88 km N of Culebra, Puerto Rico
  10. 3.4 105 km N of Culebra, Puerto Rico
  11. 3.4 128 km N of Charlotte Amalie, U.S. Virgin Islands
  12. 3.4 140 km NNE of Vieques, Puerto Rico
  13. 3.5 82 km NNE of Vieques, Puerto Rico
  14. 3.9 124 km N of Suárez, Puerto Rico
  15. 3.5 79 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 57 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.