QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9Md

70 km N of San Juan, Puerto Rico

· 21 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dorado Municipio 73 kmToa Baja Municipio 73 kmCataño Municipio 73 kmLoíza Municipio 74 kmSan Juan Municipio 75 kmCarolina Municipio 79 kmVega Alta Municipio 79 kmVega Baja Municipio 80 kmToa Alta Municipio 84 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 2.9 (Md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 73 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3467 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 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 19.0986, -66.0558. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 73 km (45 mi) NNE of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 73 km (45 mi) NNE of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 73 km (46 mi) N of here earthquakes near Cataño Municipio
Loíza Municipio, PR 74 km (46 mi) N of here earthquakes near Loíza Municipio
San Juan Municipio, PR 75 km (47 mi) N of here earthquakes near San Juan Municipio
Carolina Municipio, PR 79 km (49 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

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

  1. 2.9 75 km N of Suárez, Puerto Rico
  2. 3.2 104 km N of Loíza, Puerto Rico
  3. 2.9 47 km NNE of San Juan, Puerto Rico
  4. 3.0 83 km N of San Juan, Puerto Rico
  5. 2.7 74 km N of San Juan, Puerto Rico
  6. 3.0 80 km N of Tierras Nuevas Poniente, Puerto Rico
  7. 3.2 86 km N of Suárez, Puerto Rico
  8. 3.3 113 km N of Brenas, Puerto Rico
  9. 2.4 102 km N of San Juan, Puerto Rico
  10. 2.9 78 km NNE of Suárez, Puerto Rico
  11. 2.9 78 km NNE of Suárez, Puerto Rico
  12. 2.7 77 km NNE of Vieques, Puerto Rico
  13. 3.4 84 km NNE of Vieques, Puerto Rico
  14. 3.1 67 km NNE of Suárez, Puerto Rico
  15. 3.3 112 km N of Suárez, 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.