QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

37 km N of Suárez, Puerto Rico

· 15 km deep · released about 1,200 lb of TNT

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10 km30 km60 km120 km N Loíza Municipio 38 kmRío Grande Municipio 43 kmCarolina Municipio 44 kmLuquillo Municipio 46 kmSan Juan Municipio 46 kmCanóvanas Municipio 49 kmFajardo Municipio 49 kmCataño Municipio 49 kmTrujillo Alto Municipio 51 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
15 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 38 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1178 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 1,200 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 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× 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 18.7647, -65.8242. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 38 km (23 mi) NNE of here earthquakes near Loíza Municipio
Río Grande Municipio, PR 43 km (27 mi) N of here earthquakes near Río Grande Municipio
Carolina Municipio, PR 44 km (27 mi) NNE of here earthquakes near Carolina Municipio
Luquillo Municipio, PR 46 km (28 mi) NNW of here earthquakes near Luquillo Municipio
San Juan Municipio, PR 46 km (29 mi) NE of here earthquakes near San Juan Municipio
Canóvanas Municipio, PR 49 km (30 mi) N of here earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 3.2 50 km N of Suárez, Puerto Rico
  2. 3.6 63 km NNE of Vieques, Puerto Rico
  3. 3.1 65 km N of San Juan, Puerto Rico
  4. 3.2 71 km N of San Juan, Puerto Rico
  5. 3.9 52 km N of Suárez, Puerto Rico
  6. 3.5 70 km NNE of Luquillo, Puerto Rico
  7. 3.2 77 km NNE of Vieques, Puerto Rico
  8. 4.2 58 km NNE of Luquillo, Puerto Rico
  9. 2.9 56 km NNE of Luquillo, Puerto Rico
  10. 2.9 4 km NNW of Santa Barbara, Puerto Rico
  11. 2.9 42 km N of San Juan, Puerto Rico
  12. 3.1 37 km N of San Juan, Puerto Rico
  13. 3.2 63 km N of San Juan, Puerto Rico
  14. 3.1 Puerto Rico region
  15. 3.0 53 km N of Loíza, 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.