QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

109 km N of Suárez, Puerto Rico

· 14 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 109 kmSan Juan Municipio 114 kmCataño Municipio 114 kmToa Baja Municipio 114 kmCarolina Municipio 115 kmDorado Municipio 116 kmRío Grande Municipio 116 kmFajardo Municipio 117 kmLuquillo Municipio 117 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 3.1 (md)
Depth
14 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Loíza Municipio, 109 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3369 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 19.4161, -65.7985. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 109 km (68 mi) N of here earthquakes near Loíza Municipio
San Juan Municipio, PR 114 km (71 mi) NNE of here earthquakes near San Juan Municipio
Cataño Municipio, PR 114 km (71 mi) NNE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 114 km (71 mi) NNE of here earthquakes near Toa Baja Municipio
Carolina Municipio, PR 115 km (71 mi) N of here earthquakes near Carolina Municipio
Dorado Municipio, PR 116 km (72 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

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

  1. 3.0 101 km NNE of Vieques, Puerto Rico
  2. 3.3 114 km N of San Juan, Puerto Rico
  3. 3.4 128 km N of San Juan, Puerto Rico
  4. 3.1 77 km N of San Juan, Puerto Rico
  5. 3.4 97 km NNE of Suárez, Puerto Rico
  6. 3.0 121 km N of Suárez, Puerto Rico
  7. 3.2 98 km N of San Juan, Puerto Rico
  8. 3.6 98 km NNE of Vieques, Puerto Rico
  9. 3.3 Puerto Rico region
  10. 3.4 93 km N of San Juan, Puerto Rico
  11. 3.2 87 km N of San Juan, Puerto Rico
  12. 3.2 95 km N of Suárez, Puerto Rico
  13. 3.4 75 km NNE of Vieques, Puerto Rico
  14. 2.4 75 km N of Suárez, Puerto Rico
  15. 3.1 67 km NNE 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.