QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

4 km WNW of Boquerón, Puerto Rico

· 18 km deep · released about 450 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 6 kmHormigueros Municipio 14 kmLajas Municipio 19 kmSan Germán Municipio 19 kmSabana Grande Municipio 28 kmAñasco Municipio 28 kmGuánica Municipio 32 kmLas Marías Municipio 32 kmMaricao 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 2.8 (md)
Depth
18 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 6 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1171 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 450 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 34,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 24,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 450 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 18.0412, -67.2048. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 6 km (3 mi) NNW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 14 km (9 mi) SW of here earthquakes near Hormigueros Municipio
Lajas Municipio, PR 19 km (12 mi) WNW of here earthquakes near Lajas Municipio
San Germán Municipio, PR 19 km (12 mi) WSW of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 28 km (17 mi) W of here earthquakes near Sabana Grande Municipio
Añasco Municipio, PR 28 km (18 mi) SSW of here earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 2.7 Puerto Rico region
  2. 2.5 14 km SSE of Guánica, Puerto Rico
  3. 2.7 Mona Passage
  4. 2.2 4 km WSW of Palmarejo, Puerto Rico
  5. 2.3 10 km SSE of Maria Antonia, Puerto Rico
  6. 3.2 5 km SW of Guánica, Puerto Rico
  7. 2.7 9 km NW of Puerto Real, Puerto Rico
  8. 2.6 8 km WSW of La Parguera, Puerto Rico
  9. 2.6 2 km WNW of La Parguera, Puerto Rico
  10. 2.4 21 km SW of Stella, Puerto Rico
  11. 2.0 1 km E of Palomas, Puerto Rico
  12. 2.2 5 km SSE of Maria Antonia, Puerto Rico
  13. 2.1 5 km WSW of Liborio Negron Torres, Puerto Rico
  14. 2.8 Mona Passage
  15. 2.6 2 km SE of Palmarejo, 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 6.4 on 2020-01-07 — it released about 270,000 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.