QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1Md

89 km NNE of Vieques, Puerto Rico

· 28 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 86 kmLuquillo Municipio 91 kmCulebra Municipio 92 kmRío Grande Municipio 93 kmLoíza Municipio 94 kmCarolina Municipio 100 kmCeiba Municipio 101 kmCanóvanas Municipio 102 kmSan Juan Municipio 104 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
28 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 86 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3538 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 1,300 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 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 19.1432, -65.4369. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 86 km (53 mi) N of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 91 km (56 mi) NNE of here earthquakes near Luquillo Municipio
Culebra Municipio, PR 92 km (57 mi) N of here earthquakes near Culebra Municipio
Río Grande Municipio, PR 93 km (58 mi) NNE of here earthquakes near Río Grande Municipio
Loíza Municipio, PR 94 km (58 mi) NE of here earthquakes near Loíza Municipio
Carolina Municipio, PR 100 km (62 mi) NE of here earthquakes near Carolina 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. 1.6 91 km NNE of Luquillo, Puerto Rico
  2. 3.4 85 km N of Culebra, Puerto Rico
  3. 3.9 118 km NNE of Vieques, Puerto Rico
  4. 2.9 105 km NNE of Vieques, Puerto Rico
  5. 2.9 79 km N of Culebra, Puerto Rico
  6. 2.7 94 km NNW of Charlotte Amalie, U.S. Virgin Islands
  7. 3.6 121 km N of Charlotte Amalie, U.S. Virgin Islands
  8. 2.4 126 km NNE of Vieques, Puerto Rico
  9. 2.5 50 km NNE of Luquillo, Puerto Rico
  10. 2.5 73 km N of Culebra, Puerto Rico
  11. 3.1 102 km N of Charlotte Amalie, U.S. Virgin Islands
  12. 3.2 120 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 3.0 68 km NNW of Charlotte Amalie, U.S. Virgin Islands
  14. 2.0 75 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 2.9 74 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 4.3 on 2016-09-04 — it released about 63 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.