QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

41 km N of Suárez, Puerto Rico

· 16 km deep · released about 2.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 43 kmRío Grande Municipio 47 kmCarolina Municipio 49 kmLuquillo Municipio 49 kmFajardo Municipio 51 kmSan Juan Municipio 51 kmCanóvanas Municipio 53 kmCataño Municipio 54 kmTrujillo Alto Municipio 56 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
16 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Loíza Municipio, 43 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1510 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.1 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 80,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,500× the energy of this one
  4. This earthquake M 3.4 about 2.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.4× 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 18.8015, -65.7947. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 43 km (26 mi) NNE of here earthquakes near Loíza Municipio
Río Grande Municipio, PR 47 km (29 mi) N of here earthquakes near Río Grande Municipio
Carolina Municipio, PR 49 km (30 mi) NNE of here earthquakes near Carolina Municipio
Luquillo Municipio, PR 49 km (30 mi) N of here earthquakes near Luquillo Municipio
Fajardo Municipio, PR 51 km (32 mi) NNW of here earthquakes near Fajardo Municipio
San Juan Municipio, PR 51 km (32 mi) NE of here earthquakes near San Juan Municipio

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

Aftershocks so far

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

  1. 3.1 61 km N of San Juan, Puerto Rico
  2. 3.0 73 km N of San Juan, Puerto Rico
  3. 3.3 56 km NNE of Luquillo, Puerto Rico
  4. 3.1 22 km NE of Luquillo, Puerto Rico
  5. 3.4 75 km N of Culebra, Puerto Rico
  6. 3.3 58 km NNE of Luquillo, Puerto Rico
  7. 3.8 5 km ENE of San Juan, Puerto Rico
  8. 3.5 29 km NNE of Luquillo, Puerto Rico
  9. 3.2 56 km NNE of Luquillo, Puerto Rico
  10. 2.9 60 km N of Loíza, Puerto Rico
  11. 2.7 41 km N of Suárez, Puerto Rico
  12. 3.3 59 km N of Loíza, Puerto Rico
  13. 2.8 13 km N of Levittown, Puerto Rico
  14. 3.1 52 km N of Loíza, Puerto Rico
  15. 3.1 77 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.