QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

20 km SW of Stella, Puerto Rico

· 9.1 km deep · released about 510 lb of TNT

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10 km30 km60 km120 km N Rincón Municipio 22 kmHormigueros Municipio 27 kmAñasco Municipio 28 kmCabo Rojo Municipio 28 kmAguada Municipio 29 kmSan Germán Municipio 36 kmMoca Municipio 38 kmLajas Municipio 41 kmAguadilla Municipio 41 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 2.8 (md)
Depth
9.1 km below the surface
Felt
no reports yet
Nearest
Rincón Municipio, 22 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 983 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 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 18.1768, -67.3705. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 22 km (14 mi) SW of here earthquakes near Rincón Municipio
Hormigueros Municipio, PR 27 km (17 mi) W of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 28 km (17 mi) WSW of here earthquakes near Añasco Municipio
Cabo Rojo Municipio, PR 28 km (18 mi) NW of here earthquakes near Cabo Rojo Municipio
Aguada Municipio, PR 29 km (18 mi) SW of here earthquakes near Aguada Municipio
San Germán Municipio, PR 36 km (22 mi) WNW of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 2.4 Puerto Rico region
  2. 1.5 4 km WSW of La Parguera, Puerto Rico
  3. 2.4 3 km ESE of Boquerón, Puerto Rico
  4. 1.7 Puerto Rico region
  5. 1.7 Puerto Rico region
  6. 2.5 2 km S of Liborio Negron Torres, Puerto Rico
  7. 2.2 3 km NW of Fuig, Puerto Rico
  8. 2.8 4 km E of La Parguera, Puerto Rico
  9. 2.4 5 km WSW of Fuig, Puerto Rico
  10. 1.9 3 km NW of Fuig, Puerto Rico
  11. 2.6 4 km SSE of La Parguera, Puerto Rico
  12. 2.5 6 km E of La Parguera, Puerto Rico
  13. 2.4 14 km NW of Aguada, Puerto Rico
  14. 2.3 4 km W of Fuig, Puerto Rico
  15. 2.6 5 km W of Boquerón, 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 5.3 on 2020-07-03 — it released about 5,200 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.