QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8md

39 km N of Carrizales, Puerto Rico

· 48 km deep · released about 7.8 tons of TNT

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10 km30 km60 km120 km N Hatillo Municipio 44 kmBarceloneta Municipio 45 kmArecibo Municipio 45 kmCamuy Municipio 45 kmQuebradillas Municipio 46 kmIsabela Municipio 49 kmManatí Municipio 51 kmFlorida Municipio 55 kmVega Baja Municipio 56 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 3.8 (md)
Depth
48 km below the surface
Felt
no reports yet
Nearest
Hatillo Municipio, 44 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1018 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 7.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 970× the energy of this one
  3. Magna, Utah 2020 M 5.7 680× the energy of this one
  4. This earthquake M 3.8 about 7.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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 18.8358, -66.7400. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hatillo Municipio, PR 44 km (28 mi) N of here earthquakes near Hatillo Municipio
Barceloneta Municipio, PR 45 km (28 mi) NNW of here earthquakes near Barceloneta Municipio
Arecibo Municipio, PR 45 km (28 mi) N of here earthquakes near Arecibo Municipio
Camuy Municipio, PR 45 km (28 mi) NNE of here earthquakes near Camuy Municipio
Quebradillas Municipio, PR 46 km (28 mi) NNE of here earthquakes near Quebradillas Municipio
Isabela Municipio, PR 49 km (30 mi) NE of here earthquakes near Isabela Municipio

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

Aftershocks so far

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

  1. 3.0 27 km NNW of Brenas, Puerto Rico
  2. 2.7 32 km N of Arecibo, Puerto Rico
  3. 3.0 51 km N of Brenas, Puerto Rico
  4. 3.6 63 km N of Arecibo, Puerto Rico
  5. 3.5 74 km N of Arecibo, Puerto Rico
  6. 3.4 80 km N of Arecibo, Puerto Rico
  7. 3.4 75 km N of Arecibo, Puerto Rico
  8. 3.1 72 km N of Arecibo, Puerto Rico
  9. 3.5 68 km N of Arecibo, Puerto Rico
  10. 3.2 84 km N of Isabela, Puerto Rico
  11. 3.0 12 km NNE of Isabela, Puerto Rico
  12. 3.2 74 km N of Tierras Nuevas Poniente, Puerto Rico
  13. 3.2 63 km N of Tierras Nuevas Poniente, Puerto Rico
  14. 3.7 73 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.4 67 km N of Tierras Nuevas Poniente, 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 4.8 on 2017-08-18 — it released about 31 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.