QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8md

49 km W of Rincón, Puerto Rico

· 140 km deep · released about 7.6 tons of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 32 kmRincón Municipio 49 kmAguada Municipio 56 kmAñasco Municipio 62 kmAguadilla Municipio 63 kmHormigueros Municipio 66 kmCabo Rojo Municipio 67 kmMoca Municipio 67 kmSan Germán Municipio 75 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 3.8 (md)
Depth
140 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 32 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 804 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 7.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 710× the energy of this one
  4. This earthquake M 3.8 about 7.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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 18.3180, -67.7145. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 32 km (20 mi) NE of here earthquakes near Mayagüez Municipio
Rincón Municipio, PR 49 km (30 mi) W of here earthquakes near Rincón Municipio
Aguada Municipio, PR 56 km (35 mi) W of here earthquakes near Aguada Municipio
Añasco Municipio, PR 62 km (38 mi) W of here earthquakes near Añasco Municipio
Aguadilla Municipio, PR 63 km (39 mi) WSW of here earthquakes near Aguadilla Municipio
Hormigueros Municipio, PR 66 km (41 mi) WNW of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 3.3 58 km WSW of Stella, Puerto Rico
  2. 3.5 76 km W of Puerto Real, Puerto Rico
  3. 3.2 30 km W of Rincón, Puerto Rico
  4. 2.3 21 km WNW of Rincón, Puerto Rico
  5. 3.6 49 km ESE of Punta Cana, Dominican Republic
  6. 3.2 37 km WNW of Rincón, Puerto Rico
  7. 2.9 19 km SW of Stella, Puerto Rico
  8. 3.0 29 km WSW of Stella, Puerto Rico
  9. 3.4 19 km WNW of Rincón, Puerto Rico
  10. 3.1 22 km W of Rincón, Puerto Rico
  11. 2.9 33 km WSW of Stella, Puerto Rico
  12. 3.2 25 km WSW of Stella, Puerto Rico
  13. 3.0 33 km WNW of Rincón, Puerto Rico
  14. 2.9 3 km W of Stella, Puerto Rico
  15. 3.3 15 km SSW of Stella, 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 2017-10-01 — it released about 7.9 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.