QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7md

109 km NNE of Vieques, Puerto Rico

· 30 km deep · released about 4.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 110 kmLoíza Municipio 112 kmLuquillo Municipio 113 kmRío Grande Municipio 114 kmCarolina Municipio 118 kmCulebra Municipio 119 kmSan Juan Municipio 120 km
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
30 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 110 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1394 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 4.8 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 35,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,100× the energy of this one
  4. This earthquake M 3.7 about 4.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 10× 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 19.3748, -65.5343. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 110 km (68 mi) N of here earthquakes near Fajardo Municipio
Loíza Municipio, PR 112 km (70 mi) NNE of here earthquakes near Loíza Municipio
Luquillo Municipio, PR 113 km (71 mi) N of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 114 km (71 mi) NNE of here earthquakes near Río Grande Municipio
Carolina Municipio, PR 118 km (73 mi) NNE of here earthquakes near Carolina Municipio
Culebra Municipio, PR 119 km (74 mi) NNW of here earthquakes near Culebra Municipio

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

Aftershocks so far

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

  1. 3.9 126 km NNE of San Juan, Puerto Rico
  2. 3.1 Puerto Rico region
  3. 3.9 130 km NNE of San Juan, Puerto Rico
  4. 3.8 93 km N of Suárez, Puerto Rico
  5. 3.9 123 km NNE of San Juan, Puerto Rico
  6. 3.6 97 km N of Suárez, Puerto Rico
  7. 3.7 116 km N of Suárez, Puerto Rico
  8. 3.4 111 km N of Suárez, Puerto Rico
  9. 3.4 132 km N of Suárez, Puerto Rico
  10. 3.6 111 km N of Suárez, Puerto Rico
  11. 3.6 87 km N of Culebra, Puerto Rico
  12. 3.6 140 km N of Suárez, Puerto Rico
  13. 3.7 82 km NNE of Suárez, Puerto Rico
  14. 3.8 118 km N of Suárez, Puerto Rico
  15. 3.3 110 km NNW of Charlotte Amalie, 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 4.5 on 2018-03-06 — it released about 18 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.