QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1Md

18 km NNE of Arecibo, Puerto Rico

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

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10 km30 km60 km120 km N Barceloneta Municipio 22 kmArecibo Municipio 22 kmHatillo Municipio 26 kmManatí Municipio 28 kmCamuy Municipio 30 kmFlorida Municipio 32 kmQuebradillas Municipio 33 kmVega Baja Municipio 35 kmIsabela Municipio 40 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
99 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 22 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3456 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 6.7 250,000× 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 18.6352, -66.6660. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 22 km (13 mi) NNW of here earthquakes near Barceloneta Municipio
Arecibo Municipio, PR 22 km (14 mi) N of here earthquakes near Arecibo Municipio
Hatillo Municipio, PR 26 km (16 mi) NNE of here earthquakes near Hatillo Municipio
Manatí Municipio, PR 28 km (17 mi) NW of here earthquakes near Manatí Municipio
Camuy Municipio, PR 30 km (18 mi) NE of here earthquakes near Camuy Municipio
Florida Municipio, PR 32 km (20 mi) NNW of here earthquakes near Florida Municipio

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

Aftershocks so far

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

  1. 3.2 15 km NNW of Camuy, Puerto Rico
  2. 2.9 44 km N of Brenas, Puerto Rico
  3. 3.1 58 km N of Hatillo, Puerto Rico
  4. 2.9 24 km NNE of Isabela, Puerto Rico
  5. 2.7 52 km N of Carrizales, Puerto Rico
  6. 3.2 54 km N of Carrizales, Puerto Rico
  7. 3.0 15 km NNE of Carrizales, Puerto Rico
  8. 2.8 48 km N of Isabela, Puerto Rico
  9. 2.6 12 km N of Garrochales, Puerto Rico
  10. 2.9 32 km NNW of Brenas, Puerto Rico
  11. 4.0 61 km N of Hatillo, Puerto Rico
  12. 2.5 52 km N of Brenas, Puerto Rico
  13. 2.5 10 km N of Hatillo, Puerto Rico
  14. 2.9 Puerto Rico region
  15. 2.3 10 km NNE of Carrizales, 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

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