QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

4 km N of Las Marias, Puerto Rico

· 16 km deep · released about 680 lb of TNT

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10 km30 km60 km120 km N Añasco Municipio 5 kmAguada Municipio 7 kmMoca Municipio 9 kmRincón Municipio 11 kmAguadilla Municipio 17 kmSan Sebastián Municipio 18 kmLas Marías Municipio 21 kmHormigueros Municipio 22 kmIsabela Municipio 22 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
16 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 5 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1575 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 680 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 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 18.3295, -67.1432. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 5 km (3 mi) NNW of here earthquakes near Añasco Municipio
Aguada Municipio, PR 7 km (4 mi) SE of here earthquakes near Aguada Municipio
Moca Municipio, PR 9 km (5 mi) SW of here earthquakes near Moca Municipio
Rincón Municipio, PR 11 km (7 mi) E of here earthquakes near Rincón Municipio
Aguadilla Municipio, PR 17 km (10 mi) S of here earthquakes near Aguadilla Municipio
San Sebastián Municipio, PR 18 km (11 mi) W of here earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 2.1 6 km W of Fuig, Puerto Rico
  2. 2.8 1 km NNW of Indios, Puerto Rico
  3. 2.6 2 km NNW of Yauco, Puerto Rico
  4. 2.2 1 km ESE of Maria Antonia, Puerto Rico
  5. 1.9 Puerto Rico region
  6. 2.6 3 km E of Espino, Puerto Rico
  7. 2.4 7 km SSE of La Parguera, Puerto Rico
  8. 2.1 2 km S of Yauco, Puerto Rico
  9. 1.8 3 km NNW of Yauco, Puerto Rico
  10. 2.1 2 km WNW of Fuig, Puerto Rico
  11. 2.1 0 km S of Palomas, Puerto Rico
  12. 2.3 1 km SE of Sabana Eneas, Puerto Rico
  13. 2.0 6 km W of Fuig, Puerto Rico
  14. 1.9 5 km WSW of Guánica, Puerto Rico
  15. 2.0 2 km E of Palomas, 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 4,000 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.