QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

107 km NNE of Vieques, Puerto Rico

· 35 km deep · released about 1,200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 109 kmLoíza Municipio 109 kmLuquillo Municipio 112 kmRío Grande Municipio 112 kmCarolina Municipio 115 kmSan Juan Municipio 117 kmCulebra Municipio 119 kmCataño Municipio 119 kmCanóvanas 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 3.1 (md)
Depth
35 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 109 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2903 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 1,200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× 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 19.3628, -65.5716. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 109 km (67 mi) N of here earthquakes near Fajardo Municipio
Loíza Municipio, PR 109 km (68 mi) NNE of here earthquakes near Loíza Municipio
Luquillo Municipio, PR 112 km (69 mi) N of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 112 km (70 mi) NNE of here earthquakes near Río Grande Municipio
Carolina Municipio, PR 115 km (72 mi) NNE of here earthquakes near Carolina Municipio
San Juan Municipio, PR 117 km (73 mi) NNE of here earthquakes near San Juan Municipio

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

Aftershocks so far

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

  1. 3.1 116 km NNE of Vieques, Puerto Rico
  2. 3.1 108 km NNW of Charlotte Amalie, U.S. Virgin Islands
  3. 3.4 128 km NNE of Vieques, Puerto Rico
  4. 2.5 110 km NNW of Charlotte Amalie, U.S. Virgin Islands
  5. 3.2 125 km N of Culebra, Puerto Rico
  6. 3.4 135 km NNE of Suárez, Puerto Rico
  7. 2.9 127 km NNE of Vieques, Puerto Rico
  8. 3.2 103 km N of San Juan, Puerto Rico
  9. 3.1 Puerto Rico region
  10. 3.6 119 km NNW of Charlotte Amalie, U.S. Virgin Islands
  11. 2.3 77 km NNE of San Juan, Puerto Rico
  12. 2.6 72 km N of Suárez, Puerto Rico
  13. 2.8 93 km N of Culebra, Puerto Rico
  14. 3.1 93 km NNE of San Juan, Puerto Rico
  15. 3.0 85 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 4.5 on 2018-03-06 — it released about 140 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.