QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

107 km N of San Juan, Puerto Rico

· 30 km deep · released about 1.5 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dorado Municipio 110 kmLoíza Municipio 110 kmToa Baja Municipio 110 kmCataño Municipio 111 kmSan Juan Municipio 112 kmCarolina Municipio 115 kmVega Alta Municipio 116 kmVega Baja Municipio 116 kmRío Grande Municipio 119 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 3.3 (md)
Depth
30 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 110 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 87 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 1.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 110,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,500× the energy of this one
  4. This earthquake M 3.3 about 1.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.2× 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 19.4312, -66.0048. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 110 km (68 mi) NNE of here earthquakes near Dorado Municipio
Loíza Municipio, PR 110 km (68 mi) N of here earthquakes near Loíza Municipio
Toa Baja Municipio, PR 110 km (68 mi) N of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 111 km (69 mi) N of here earthquakes near Cataño Municipio
San Juan Municipio, PR 112 km (70 mi) N of here earthquakes near San Juan Municipio
Carolina Municipio, PR 115 km (72 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

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

  1. 3.1 75 km N of Brenas, Puerto Rico
  2. 3.3 110 km N of Suárez, Puerto Rico
  3. 3.2 93 km N of San Juan, Puerto Rico
  4. 3.7 117 km N of San Juan, Puerto Rico
  5. 3.3 80 km N of San Juan, Puerto Rico
  6. 3.4 75 km N of San Juan, Puerto Rico
  7. 3.4 110 km N of Suárez, Puerto Rico
  8. 3.1 63 km N of San Juan, Puerto Rico
  9. 3.3 109 km N of Suárez, Puerto Rico
  10. 3.4 110 km N of Suárez, Puerto Rico
  11. 3.3 113 km NNE of San Juan, Puerto Rico
  12. 3.4 121 km NNE of San Juan, Puerto Rico
  13. 3.6 95 km N of San Juan, Puerto Rico
  14. 3.4 108 km NNE of San Juan, Puerto Rico
  15. 3.6 104 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2016-10-23 — it released about 39 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.