QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9md

60 km N of Hatillo, Puerto Rico

· 31 km deep · released about 12 tons of TNT

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10 km30 km60 km120 km N Quebradillas Municipio 65 kmHatillo Municipio 65 kmCamuy Municipio 66 kmBarceloneta Municipio 66 kmIsabela Municipio 66 kmArecibo Municipio 67 kmManatí Municipio 71 kmAguadilla Municipio 73 kmVega Baja Municipio 74 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 3.9 (md)
Depth
31 km below the surface
Felt
no reports yet
Nearest
Quebradillas Municipio, 65 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 8 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 12 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 14,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 640× the energy of this one
  3. Magna, Utah 2020 M 5.7 450× the energy of this one
  4. This earthquake M 3.9 about 12 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 25× 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 19.0278, -66.7626. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Quebradillas Municipio, PR 65 km (40 mi) NNE of here earthquakes near Quebradillas Municipio
Hatillo Municipio, PR 65 km (41 mi) N of here earthquakes near Hatillo Municipio
Camuy Municipio, PR 66 km (41 mi) N of here earthquakes near Camuy Municipio
Barceloneta Municipio, PR 66 km (41 mi) NNW of here earthquakes near Barceloneta Municipio
Isabela Municipio, PR 66 km (41 mi) NNE of here earthquakes near Isabela Municipio
Arecibo Municipio, PR 67 km (41 mi) N of here earthquakes near Arecibo Municipio

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

Aftershocks so far

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

  1. 2.8 13 km NNE of Carrizales, Puerto Rico
  2. 3.0 15 km N of Arecibo, Puerto Rico
  3. 3.2 27 km N of Isabela, Puerto Rico
  4. 2.9 65 km N of Tierras Nuevas Poniente, Puerto Rico
  5. 2.8 43 km NNE of Arecibo, Puerto Rico
  6. 3.1 36 km NNE of Arecibo, Puerto Rico
  7. 2.4 19 km NNE of Arecibo, Puerto Rico
  8. 3.1 57 km N of Hatillo, Puerto Rico
  9. 3.0 52 km N of Hatillo, Puerto Rico
  10. 2.7 14 km N of Carrizales, Puerto Rico
  11. 3.1 53 km N of San Antonio, Puerto Rico
  12. 3.0 70 km N of Tierras Nuevas Poniente, Puerto Rico
  13. 3.1 43 km NNW of San Antonio, Puerto Rico
  14. 2.5 22 km NNW of Camuy, Puerto Rico
  15. 2.7 41 km N of Brenas, 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 5.1 on 2019-09-24 — it released about 50 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.