QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7md

39 km WNW of Rincón, Puerto Rico

· 5.0 km deep · released about 4.7 tons of TNT

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10 km30 km60 km120 km N Rincón Municipio 40 kmAguada Municipio 46 kmMayagüez Municipio 48 kmAguadilla Municipio 50 kmAñasco Municipio 53 kmMoca Municipio 57 kmHormigueros Municipio 62 kmIsabela Municipio 64 kmCabo Rojo Municipio 66 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
5.0 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Rincón Municipio, 40 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 388 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 4.7 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 36,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,600× 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 4.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 9.8× 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 18.4283, -67.6136. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 40 km (25 mi) WNW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 46 km (28 mi) W of here earthquakes near Aguada Municipio
Mayagüez Municipio, PR 48 km (30 mi) NE of here earthquakes near Mayagüez Municipio
Aguadilla Municipio, PR 50 km (31 mi) W of here earthquakes near Aguadilla Municipio
Añasco Municipio, PR 53 km (33 mi) WNW of here earthquakes near Añasco Municipio
Moca Municipio, PR 57 km (35 mi) W of here earthquakes near Moca Municipio

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

Aftershocks so far

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

  1. 2.5 3 km SW of Luyando, Puerto Rico
  2. 3.7 13 km WNW of Aguadilla, Puerto Rico
  3. 3.7 48 km WSW of Stella, Puerto Rico
  4. 3.4 61 km ESE of Punta Cana, Dominican Republic
  5. 3.2 6 km NNW of Rincón, Puerto Rico
  6. 2.9 12 km NW of Puerto Real, Puerto Rico
  7. 3.8 60 km W of Rincón, Puerto Rico
  8. 3.5 64 km W of Stella, Puerto Rico
  9. 3.2 54 km WSW of Stella, Puerto Rico
  10. 3.8 54 km WSW of Stella, Puerto Rico
  11. 3.0 64 km WSW of Stella, Puerto Rico
  12. 2.9 45 km W of Rincón, Puerto Rico
  13. 3.4 61 km WSW of Stella, Puerto Rico
  14. 2.4 20 km SW of Stella, Puerto Rico
  15. 3.1 67 km SE of Punta Cana, Dominican Republic

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 2017-10-01 — it released about 13 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.