QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7md

65 km N of Hatillo, Puerto Rico

· 36 km deep · released about 5 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 68 kmQuebradillas Municipio 69 kmCamuy Municipio 71 kmHatillo Municipio 71 kmAguadilla Municipio 73 kmArecibo Municipio 74 kmBarceloneta Municipio 75 kmManatí Municipio 80 kmMoca Municipio 82 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 3.7 (md)
Depth
36 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 68 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1491 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 5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 34,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,100× the energy of this one
  4. This earthquake M 3.7 about 5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 10× 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 19.0806, -66.8533. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 68 km (43 mi) NNE of here earthquakes near Isabela Municipio
Quebradillas Municipio, PR 69 km (43 mi) N of here earthquakes near Quebradillas Municipio
Camuy Municipio, PR 71 km (44 mi) N of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 71 km (44 mi) N of here earthquakes near Hatillo Municipio
Aguadilla Municipio, PR 73 km (46 mi) NNE of here earthquakes near Aguadilla Municipio
Arecibo Municipio, PR 74 km (46 mi) NNW of here earthquakes near Arecibo Municipio

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

Aftershocks so far

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

  1. 3.1 78 km NNE of Arecibo, Puerto Rico
  2. 3.2 75 km N of Arecibo, Puerto Rico
  3. 2.6 37 km NNW of San Antonio, Puerto Rico
  4. 3.8 73 km N of San Antonio, Puerto Rico
  5. 3.4 49 km N of Tierras Nuevas Poniente, Puerto Rico
  6. 3.7 23 km NNE of Isabela, Puerto Rico
  7. 3.4 79 km N of Tierras Nuevas Poniente, Puerto Rico
  8. 3.4 82 km N of Tierras Nuevas Poniente, Puerto Rico
  9. 3.0 70 km N of Tierras Nuevas Poniente, Puerto Rico
  10. 3.6 81 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 3.8 Mona Passage
  12. 3.3 Mona Passage
  13. 2.8 36 km NNE of Arecibo, Puerto Rico
  14. 3.0 19 km N of Isabela, Puerto Rico
  15. 2.8 42 km NNW of San Antonio, 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 6.0 on 2019-09-24 — it released about 3,000 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.