QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7Ml

1 km WSW of Stella, Puerto Rico

· 22 km deep · released about 5.4 tons of TNT

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10 km30 km60 km120 km N Rincón Municipio 3 kmAguada Municipio 10 kmAñasco Municipio 14 kmMoca Municipio 20 kmAguadilla Municipio 22 kmHormigueros Municipio 25 kmSan Sebastián Municipio 31 kmLas Marías Municipio 31 kmIsabela Municipio 32 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 (Ml)
Depth
22 km below the surface
Felt
9 reports · strongest reported intensity III
Nearest
Rincón Municipio, 3 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3707 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 9 people have reported feeling it to USGS.

How big was it?

This earthquake released about 5.4 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 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× 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 18.3141, -67.2605. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 3 km (2 mi) SSW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 10 km (6 mi) SW of here earthquakes near Aguada Municipio
Añasco Municipio, PR 14 km (9 mi) WNW of here earthquakes near Añasco Municipio
Moca Municipio, PR 20 km (13 mi) WSW of here earthquakes near Moca Municipio
Aguadilla Municipio, PR 22 km (14 mi) SSW of here earthquakes near Aguadilla Municipio
Hormigueros Municipio, PR 25 km (16 mi) NW of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 2.4 7 km ENE of Hormigueros, Puerto Rico
  2. 2.1 5 km E of Hormigueros, Puerto Rico
  3. 2.3 5 km E of Hormigueros, Puerto Rico
  4. 2.4 6 km N of San Germán, Puerto Rico
  5. 1.8 5 km E of Espino, Puerto Rico
  6. 2.6 5 km SW of Liborio Negron Torres, Puerto Rico
  7. 1.7 16 km NW of Rincón, Puerto Rico
  8. 2.2 6 km WSW of Maricao, Puerto Rico
  9. 1.9 Puerto Rico region
  10. 1.9 6 km NNW of Isabela, Puerto Rico
  11. 3.3 22 km NW of Aguadilla, Puerto Rico
  12. 1.8 6 km WNW of Las Marías, Puerto Rico
  13. 2.0 18 km W of Puerto Real, Puerto Rico
  14. 3.0 10 km N of San Antonio, Puerto Rico
  15. 2.6 21 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.