QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

5 km WSW of Las Marías, Puerto Rico

· 19 km deep · released about 330 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 6 kmAñasco Municipio 12 kmMaricao Municipio 13 kmHormigueros Municipio 13 kmSan Sebastián Municipio 13 kmSan Germán Municipio 14 kmMoca Municipio 17 kmLares Municipio 19 kmSabana Grande Municipio 19 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 2.7 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 6 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 482 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 330 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 46,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 33,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.9× the energy of this one
  4. This earthquake M 2.7 about 330 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 18.2303, -67.0390. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 6 km (4 mi) W of here earthquakes near Las Marías Municipio
Añasco Municipio, PR 12 km (7 mi) ESE of here earthquakes near Añasco Municipio
Maricao Municipio, PR 13 km (8 mi) WNW of here earthquakes near Maricao Municipio
Hormigueros Municipio, PR 13 km (8 mi) NE of here earthquakes near Hormigueros Municipio
San Sebastián Municipio, PR 13 km (8 mi) SSW of here earthquakes near San Sebastián Municipio
San Germán Municipio, PR 14 km (8 mi) N 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

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

  1. 2.4 1 km ESE of Magas Arriba, Puerto Rico
  2. 2.3 3 km S of Maria Antonia, Puerto Rico
  3. 2.4 10 km SSE of Guánica, Puerto Rico
  4. 2.1 4 km SW of Indios, Puerto Rico
  5. 2.4 3 km SW of Tallaboa, Puerto Rico
  6. 1.9 2 km SW of Indios, Puerto Rico
  7. 2.4 7 km SSE of Maria Antonia, Puerto Rico
  8. 2.3 2 km NW of La Parguera, Puerto Rico
  9. 2.7 5 km SSW of Tallaboa, Puerto Rico
  10. 1.9 5 km ESE of Maria Antonia, Puerto Rico
  11. 2.2 3 km WSW of Guánica, Puerto Rico
  12. 2.0 3 km WSW of Guánica, Puerto Rico
  13. 2.3 3 km SW of Fuig, Puerto Rico
  14. 2.2 5 km SW of Guánica, Puerto Rico
  15. 2.1 4 km SSW of Guánica, 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 370,000 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.