QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

32 km NNE of Vieques, Puerto Rico

· 17 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 36 kmRío Grande Municipio 37 kmLuquillo Municipio 37 kmFajardo Municipio 38 kmCarolina Municipio 42 kmCanóvanas Municipio 45 kmSan Juan Municipio 48 kmTrujillo Alto Municipio 50 kmCeiba Municipio 51 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 2.8 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 36 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 332 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 550 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 lb of TNT

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 18.7020, -65.7278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 36 km (23 mi) NE of here earthquakes near Loíza Municipio
Río Grande Municipio, PR 37 km (23 mi) NNE of here earthquakes near Río Grande Municipio
Luquillo Municipio, PR 37 km (23 mi) N of here earthquakes near Luquillo Municipio
Fajardo Municipio, PR 38 km (24 mi) NNW of here earthquakes near Fajardo Municipio
Carolina Municipio, PR 42 km (26 mi) NE of here earthquakes near Carolina Municipio
Canóvanas Municipio, PR 45 km (28 mi) NNE of here earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 3.1 55 km NNE of San Juan, Puerto Rico
  2. 3.0 60 km N of Loíza, Puerto Rico
  3. 2.9 23 km NNE of Luquillo, Puerto Rico
  4. 3.3 41 km N of Culebra, Puerto Rico
  5. 3.2 51 km NNE of Vieques, Puerto Rico
  6. 3.1 3 km ESE of San Juan, Puerto Rico
  7. 3.3 20 km NE of Luquillo, Puerto Rico
  8. 2.5 27 km NNE of Vieques, Puerto Rico
  9. 2.8 17 km N of San Juan, Puerto Rico
  10. 3.4 49 km N of Suárez, Puerto Rico
  11. 3.1 59 km N of Loíza, Puerto Rico
  12. 3.8 30 km NNE of Luquillo, Puerto Rico
  13. 2.9 59 km N of Culebra, Puerto Rico
  14. 2.3 5 km W of Campo Rico, Puerto Rico
  15. 2.8 8 km NE of Vieques, 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 4.8 on 2021-03-09 — it released about 870 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.