QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5md

102 km NNE of San Juan, Puerto Rico

· 40 km deep · released about 2.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 103 kmCataño Municipio 106 kmToa Baja Municipio 106 kmSan Juan Municipio 107 kmDorado Municipio 107 kmCarolina Municipio 108 kmRío Grande Municipio 110 kmLuquillo Municipio 112 kmFajardo Municipio 113 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 3.5 (md)
Depth
40 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 103 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3012 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 2.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,000× the energy of this one
  4. This earthquake M 3.5 about 2.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.6× 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 19.3655, -65.8731. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 103 km (64 mi) N of here earthquakes near Loíza Municipio
Cataño Municipio, PR 106 km (66 mi) NNE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 106 km (66 mi) NNE of here earthquakes near Toa Baja Municipio
San Juan Municipio, PR 107 km (66 mi) N of here earthquakes near San Juan Municipio
Dorado Municipio, PR 107 km (67 mi) NNE of here earthquakes near Dorado Municipio
Carolina Municipio, PR 108 km (67 mi) N of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 1.9 65 km N of Loíza, Puerto Rico
  2. 2.7 113 km N of Brenas, Puerto Rico
  3. 2.8 74 km N of San Juan, Puerto Rico
  4. 2.7 70 km N of San Juan, Puerto Rico
  5. 3.0 88 km NNE of Vieques, Puerto Rico
  6. 2.6 88 km NNE of Vieques, Puerto Rico
  7. 3.1 121 km NNE of Vieques, Puerto Rico
  8. 3.1 115 km N of Brenas, Puerto Rico
  9. 2.7 80 km NNE of Vieques, Puerto Rico
  10. 2.2 77 km NNE of Vieques, Puerto Rico
  11. 3.1 107 km NNE of Vieques, Puerto Rico
  12. 2.3 108 km N of Suárez, Puerto Rico
  13. 3.0 103 km NNE of Suárez, Puerto Rico
  14. 3.2 108 km NNE of Vieques, Puerto Rico
  15. 2.8 67 km N of San Juan, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.