QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

Puerto Rico region

· 107 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 112 kmLuquillo Municipio 117 kmCulebra Municipio 118 kmLoíza Municipio 118 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 3.1 (md)
Depth
107 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 112 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2735 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 1,500 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 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,200× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× 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 19.3810, -65.4163. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 112 km (70 mi) N of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 117 km (73 mi) NNE of here earthquakes near Luquillo Municipio
Culebra Municipio, PR 118 km (73 mi) N of here earthquakes near Culebra Municipio
Loíza Municipio, PR 118 km (73 mi) NNE of here earthquakes near Loíza Municipio
Río Grande Municipio, PR 119 km (74 mi) NNE of here earthquakes near Río Grande Municipio
Carolina Municipio, PR 124 km (77 mi) NNE of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 3.3 72 km NNE of Luquillo, Puerto Rico
  2. 3.2 79 km NNW of Charlotte Amalie, U.S. Virgin Islands
  3. 3.4 146 km NNE of Vieques, Puerto Rico
  4. 3.4 153 km NNE of Vieques, Puerto Rico
  5. 3.2 124 km NNE of Vieques, Puerto Rico
  6. 2.9 127 km NNE of Suárez, Puerto Rico
  7. 3.4 129 km N of Suárez, Puerto Rico
  8. 3.1 127 km N of Suárez, Puerto Rico
  9. 3.2 134 km NNE of Vieques, Puerto Rico
  10. 2.4 66 km NNE of Vieques, Puerto Rico
  11. 2.9 78 km NNE of Vieques, Puerto Rico
  12. 3.2 113 km N of Charlotte Amalie, U.S. Virgin Islands
  13. 3.4 Puerto Rico region
  14. 2.4 116 km NNW of Charlotte Amalie, U.S. Virgin Islands
  15. 2.2 106 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.9 on 2018-11-14 — it released about 450 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.