QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

17 km N of Carrizales, Puerto Rico

· 109 km deep · released about 4.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hatillo Municipio 22 kmCamuy Municipio 23 kmArecibo Municipio 24 kmQuebradillas Municipio 25 kmBarceloneta Municipio 28 kmIsabela Municipio 31 kmManatí Municipio 35 kmFlorida Municipio 36 kmSan Sebastián 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 3.6 (md)
Depth
109 km below the surface
Felt
no reports yet
Measured shaking
intensity II (ShakeMap)
Nearest
Hatillo Municipio, 22 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1943 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 4.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 42,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,300× the energy of this one
  4. This earthquake M 3.6 about 4.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.5× 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 18.6346, -66.7638. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hatillo Municipio, PR 22 km (14 mi) N of here earthquakes near Hatillo Municipio
Camuy Municipio, PR 23 km (15 mi) NNE of here earthquakes near Camuy Municipio
Arecibo Municipio, PR 24 km (15 mi) NNW of here earthquakes near Arecibo Municipio
Quebradillas Municipio, PR 25 km (16 mi) NE of here earthquakes near Quebradillas Municipio
Barceloneta Municipio, PR 28 km (18 mi) NW of here earthquakes near Barceloneta Municipio
Isabela Municipio, PR 31 km (19 mi) ENE of here earthquakes near Isabela Municipio

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

Aftershocks so far

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

  1. 3.4 61 km N of Arecibo, Puerto Rico
  2. 3.5 31 km NNW of San Antonio, Puerto Rico
  3. 2.8 3 km NW of Quebradillas, Puerto Rico
  4. 3.1 51 km N of Hatillo, Puerto Rico
  5. 3.5 14 km NNW of Brenas, Puerto Rico
  6. 3.5 22 km NNE of Tierras Nuevas Poniente, Puerto Rico
  7. 3.1 9 km N of San Antonio, Puerto Rico
  8. 3.4 15 km N of Isabela, Puerto Rico
  9. 2.1 Puerto Rico region
  10. 3.2 46 km N of Hatillo, Puerto Rico
  11. 3.4 6 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 2.8 15 km N of Hatillo, Puerto Rico
  13. 3.9 47 km N of Hatillo, Puerto Rico
  14. 3.4 22 km NNW of Isabela, Puerto Rico
  15. 3.1 3 km NE 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 4.4 on 2018-12-09 — it released about 15 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.