QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

3 km NE of Las Marias, Puerto Rico

· 17 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Las Marías Municipio 2 kmMaricao Municipio 9 kmSan Sebastián Municipio 9 kmLares Municipio 11 kmSan Germán Municipio 17 kmAñasco Municipio 18 kmSabana Grande Municipio 18 kmMoca Municipio 19 kmHormigueros Municipio 20 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 3.0 (md)
Depth
17 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Las Marías Municipio, 2 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1440 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 18.2475, -66.9687. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 2 km (1 mi) NNE of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 9 km (6 mi) NNW of here earthquakes near Maricao Municipio
San Sebastián Municipio, PR 9 km (6 mi) S of here earthquakes near San Sebastián Municipio
Lares Municipio, PR 11 km (7 mi) WSW of here earthquakes near Lares Municipio
San Germán Municipio, PR 17 km (11 mi) NNE of here earthquakes near San Germán Municipio
Añasco Municipio, PR 18 km (11 mi) ESE of here earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 2.4 Puerto Rico region
  2. 2.6 6 km E of La Parguera, Puerto Rico
  3. 2.3 Puerto Rico region
  4. 2.5 11 km S of Guánica, Puerto Rico
  5. 2.6 15 km S of Guánica, Puerto Rico
  6. 2.1 Puerto Rico region
  7. 2.6 4 km ESE of La Parguera, Puerto Rico
  8. 2.8 11 km N of Isabela, Puerto Rico
  9. 2.0 4 km ESE of La Parguera, Puerto Rico
  10. 2.6 Puerto Rico region
  11. 2.3 0 km S of Guánica, Puerto Rico
  12. 2.3 5 km WSW of Fuig, Puerto Rico
  13. 2.4 9 km S of Guánica, Puerto Rico
  14. 2.1 1 km SSW of Guánica, Puerto Rico
  15. 2.2 Puerto Rico region

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 130,000 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.