QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

109 km NNE of Vieques, Puerto Rico

· 33 km deep · released about 4.5 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 3.6 (md)
Depth
33 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Fajardo Municipio, 110 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2269 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 4.5 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 38,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,200× the energy of this one
  4. This earthquake M 3.6 about 4.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 9.4× 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 19.3745, -65.5375. 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 (69 mi) NNE of here earthquakes near Loíza Municipio
Luquillo Municipio, PR 113 km (70 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

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

  1. 3.2 77 km NNE of Vieques, Puerto Rico
  2. 3.2 94 km N of Suárez, Puerto Rico
  3. 3.2 112 km N of Suárez, Puerto Rico
  4. 3.2 74 km NNE of Vieques, Puerto Rico
  5. 3.4 98 km NNW of Charlotte Amalie, U.S. Virgin Islands
  6. 3.4 113 km N of Suárez, Puerto Rico
  7. 3.6 145 km NNE of Vieques, Puerto Rico
  8. 3.7 133 km NNW of Charlotte Amalie, U.S. Virgin Islands
  9. 3.4 106 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 2.9 84 km NNE of Luquillo, Puerto Rico
  11. 3.1 80 km NNE of Luquillo, Puerto Rico
  12. 2.9 67 km NNE of Vieques, Puerto Rico
  13. 3.4 105 km N of San Juan, Puerto Rico
  14. 3.1 78 km NNE of Luquillo, Puerto Rico
  15. 3.4 Puerto Rico region

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 19 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.