QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

6 km ESE of Las Marías, Puerto Rico

· 14 km deep · released about 1,700 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 5 kmMaricao Municipio 7 kmLares Municipio 8 kmSan Sebastián Municipio 11 kmSabana Grande Municipio 17 kmSan Germán Municipio 18 kmYauco Municipio 19 kmAdjuntas Municipio 20 kmAñasco Municipio 21 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 3.2 (md)
Depth
14 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Las Marías Municipio, 5 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 729 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 1,700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,200× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.8× more

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 18.2357, -66.9350. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 5 km (3 mi) ENE of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 7 km (4 mi) N of here earthquakes near Maricao Municipio
Lares Municipio, PR 8 km (5 mi) WSW of here earthquakes near Lares Municipio
San Sebastián Municipio, PR 11 km (7 mi) SSE of here earthquakes near San Sebastián Municipio
Sabana Grande Municipio, PR 17 km (10 mi) N of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 18 km (11 mi) NE 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

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

  1. 3.1 5 km E of La Parguera, Puerto Rico
  2. 2.6 2 km SSW of Indios, Puerto Rico
  3. 2.7 3 km SSW of Indios, Puerto Rico
  4. 2.9 6 km WSW of Fuig, Puerto Rico
  5. 2.4 1 km S of Maria Antonia, Puerto Rico
  6. 3.0 19 km NNW of Camuy, Puerto Rico
  7. 3.0 6 km NNE of San Germán, Puerto Rico
  8. 2.5 5 km S of Indios, Puerto Rico
  9. 2.5 1 km SSW of Indios, Puerto Rico
  10. 3.0 1 km SSW of Indios, Puerto Rico
  11. 2.6 1 km SW of Indios, Puerto Rico
  12. 2.6 3 km SSW of Indios, Puerto Rico
  13. 2.6 3 km SSW of Indios, Puerto Rico
  14. 3.6 9 km SSE of Guánica, Puerto Rico
  15. 2.9 1 km WSW of Indios, 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 70,000 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.