QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

113 km N of Suárez, Puerto Rico

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 114 kmFajardo Municipio 119 kmRío Grande Municipio 119 kmCarolina 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 3.1 (md)
Depth
44 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 114 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2556 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 1,300 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 6.7 270,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,500× 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 1.3× 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 19.4468, -65.7085. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 114 km (71 mi) NNE of here earthquakes near Loíza Municipio
Fajardo Municipio, PR 119 km (74 mi) N of here earthquakes near Fajardo Municipio
Río Grande Municipio, PR 119 km (74 mi) N of here earthquakes near Río Grande Municipio
Carolina Municipio, PR 120 km (75 mi) NNE of here earthquakes near Carolina Municipio
San Juan Municipio, PR 120 km (75 mi) NNE of here earthquakes near San Juan Municipio
Cataño Municipio, PR 121 km (75 mi) NNE of here earthquakes near Cataño Municipio

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

Aftershocks so far

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

  1. 3.4 135 km N of San Juan, Puerto Rico
  2. 3.2 130 km NNE of Vieques, Puerto Rico
  3. 2.9 126 km N of San Juan, Puerto Rico
  4. 2.1 81 km NNE of Suárez, Puerto Rico
  5. 2.8 94 km N of San Juan, Puerto Rico
  6. 2.5 73 km N of San Juan, Puerto Rico
  7. 2.8 84 km NNE of Vieques, Puerto Rico
  8. 3.1 95 km NNE of Luquillo, Puerto Rico
  9. 2.6 104 km N of Suárez, Puerto Rico
  10. 2.9 86 km NNE of Vieques, Puerto Rico
  11. 2.8 80 km NNE of Vieques, Puerto Rico
  12. 2.4 81 km NNE of Vieques, Puerto Rico
  13. 2.9 117 km NNE of Vieques, Puerto Rico
  14. 2.2 80 km NNE of Vieques, Puerto Rico
  15. 3.1 109 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 4.5 on 2018-03-06 — it released about 130 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.