QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

111 km N of Suárez, Puerto Rico

· 32 km deep · released about 2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 112 kmCataño Municipio 117 kmSan Juan Municipio 117 kmToa Baja Municipio 117 kmCarolina Municipio 117 kmDorado Municipio 118 kmRío Grande Municipio 118 kmFajardo Municipio 119 kmLuquillo Municipio 120 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 3.4 (md)
Depth
32 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 112 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1375 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 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 86,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,700× the energy of this one
  4. This earthquake M 3.4 about 2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.1× 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 19.4400, -65.7948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 112 km (69 mi) N of here earthquakes near Loíza Municipio
Cataño Municipio, PR 117 km (73 mi) NNE of here earthquakes near Cataño Municipio
San Juan Municipio, PR 117 km (73 mi) NNE of here earthquakes near San Juan Municipio
Toa Baja Municipio, PR 117 km (73 mi) NNE of here earthquakes near Toa Baja Municipio
Carolina Municipio, PR 117 km (73 mi) N of here earthquakes near Carolina Municipio
Dorado Municipio, PR 118 km (73 mi) NNE of here earthquakes near Dorado Municipio

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

Aftershocks so far

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

  1. 3.2 63 km NNE of San Juan, Puerto Rico
  2. 3.7 113 km N of Suárez, Puerto Rico
  3. 3.4 Puerto Rico region
  4. 3.9 138 km N of Suárez, Puerto Rico
  5. 3.3 82 km NNE of Suárez, Puerto Rico
  6. 3.1 68 km NNE of Suárez, Puerto Rico
  7. 3.3 86 km NNE of Suárez, Puerto Rico
  8. 3.6 137 km NNE of Vieques, Puerto Rico
  9. 3.4 Puerto Rico region
  10. 3.4 120 km NNE of Vieques, Puerto Rico
  11. 3.9 134 km NNE of Vieques, Puerto Rico
  12. 4.0 120 km NNE of Vieques, Puerto Rico
  13. 3.9 Puerto Rico region
  14. 3.3 131 km NNE of Vieques, Puerto Rico
  15. 3.5 132 km NNE 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 4.1 on 2022-12-09 — it released about 12 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.