QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

11 km NNE of Hatillo, Puerto Rico

· 13 km deep · released about 4.2 tons of TNT

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10 km30 km60 km120 km N Hatillo Municipio 16 kmCamuy Municipio 17 kmQuebradillas Municipio 19 kmArecibo Municipio 21 kmIsabela Municipio 25 kmBarceloneta Municipio 28 kmSan Sebastián Municipio 33 kmFlorida Municipio 35 kmLares Municipio 35 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
13 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Hatillo Municipio, 16 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1265 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 4.2 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 40,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,800× 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 4.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.8× 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 18.5828, -66.7998. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hatillo Municipio, PR 16 km (10 mi) N of here earthquakes near Hatillo Municipio
Camuy Municipio, PR 17 km (10 mi) NNE of here earthquakes near Camuy Municipio
Quebradillas Municipio, PR 19 km (12 mi) NE of here earthquakes near Quebradillas Municipio
Arecibo Municipio, PR 21 km (13 mi) NW of here earthquakes near Arecibo Municipio
Isabela Municipio, PR 25 km (16 mi) ENE of here earthquakes near Isabela Municipio
Barceloneta Municipio, PR 28 km (18 mi) WNW of here earthquakes near Barceloneta Municipio

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

Aftershocks so far

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

  1. 2.9 30 km N of Arecibo, Puerto Rico
  2. 3.1 36 km N of Carrizales, Puerto Rico
  3. 3.4 52 km N of Hatillo, Puerto Rico
  4. 3.1 Puerto Rico region
  5. 3.1 54 km N of Hatillo, Puerto Rico
  6. 3.2 3 km NNW of Jayuya, Puerto Rico
  7. 2.8 15 km NE of Arecibo, Puerto Rico
  8. 2.8 17 km N of Isabela, Puerto Rico
  9. 2.0 6 km WNW of Maricao, Puerto Rico
  10. 2.8 23 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 2.6 6 km N of Cayuco, Puerto Rico
  12. 2.9 Puerto Rico region
  13. 2.6 11 km N of Carrizales, Puerto Rico
  14. 2.5 3 km ESE of Las Marías, Puerto Rico
  15. 3.0 25 km NNE of Isabela, 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 14 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.