QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

19 km SW of Stella, Puerto Rico

· 10 km deep · released about 610 lb of TNT

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10 km30 km60 km120 km N Rincón Municipio 20 kmAguada Municipio 28 kmAñasco Municipio 29 kmHormigueros Municipio 32 kmCabo Rojo Municipio 34 kmMoca Municipio 38 kmAguadilla Municipio 39 kmSan Germán Municipio 40 kmLas Marías Municipio 45 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 2.9 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Rincón Municipio, 20 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 788 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 610 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 25,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 18,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.6× the energy of this one
  4. This earthquake M 2.9 about 610 lb of TNT

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 18.2237, -67.3998. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 20 km (13 mi) SW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 28 km (18 mi) SW of here earthquakes near Aguada Municipio
Añasco Municipio, PR 29 km (18 mi) WSW of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 32 km (20 mi) WNW of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 34 km (21 mi) NW of here earthquakes near Cabo Rojo Municipio
Moca Municipio, PR 38 km (24 mi) WSW of here earthquakes near Moca 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. 3.1 4 km E of La Parguera, Puerto Rico
  2. 2.6 9 km NNW of Puerto Real, Puerto Rico
  3. 3.3 58 km WSW of Stella, Puerto Rico
  4. 2.3 5 km ENE of La Parguera, Puerto Rico
  5. 2.7 4 km N of La Parguera, Puerto Rico
  6. 3.1 27 km NW of San Antonio, Puerto Rico
  7. 2.5 5 km ENE of La Parguera, Puerto Rico
  8. 3.2 30 km W of Rincón, Puerto Rico
  9. 2.6 2 km SSE of San Germán, Puerto Rico
  10. 2.8 3 km WSW of La Parguera, Puerto Rico
  11. 2.3 21 km WNW of Rincón, Puerto Rico
  12. 2.8 1 km ESE of Palmarejo, Puerto Rico
  13. 2.8 3 km NW of Mayagüez, Puerto Rico
  14. 2.1 2 km ESE of Puerto Real, Puerto Rico
  15. 2.3 7 km ESE of Mayagüez, 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 4.5 on 2021-07-18 — it released about 240 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.