QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km SW of Las Marías, Puerto Rico

· 24 km deep · released about 44 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 4 kmMaricao Municipio 10 kmSan Sebastián Municipio 12 kmSan Germán Municipio 14 kmAñasco Municipio 14 kmHormigueros Municipio 15 kmLares Municipio 16 kmSabana Grande Municipio 18 kmMoca Municipio 18 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 2.1 (md)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 4 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2933 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 44 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 44 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 18.2301, -67.0148. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 4 km (2 mi) W of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 10 km (6 mi) NW of here earthquakes near Maricao Municipio
San Sebastián Municipio, PR 12 km (8 mi) SSW of here earthquakes near San Sebastián Municipio
San Germán Municipio, PR 14 km (9 mi) N of here earthquakes near San Germán Municipio
Añasco Municipio, PR 14 km (9 mi) ESE of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 15 km (9 mi) NE of here earthquakes near Hormigueros 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. 2.3 4 km E of Boquerón, Puerto Rico
  2. 1.9 8 km S of La Parguera, Puerto Rico
  3. 1.7 7 km S of La Parguera, Puerto Rico
  4. 1.7 Puerto Rico region
  5. 1.5 7 km SSE of La Parguera, Puerto Rico
  6. 2.2 6 km NW of Sabana Grande, Puerto Rico
  7. 2.0 1 km SW of Maricao, Puerto Rico
  8. 2.0 1 km NW of Palomas, Puerto Rico
  9. 1.9 3 km SE of Maricao, Puerto Rico
  10. 2.0 3 km ENE of Mayagüez, Puerto Rico
  11. 2.1 9 km S of Guánica, Puerto Rico
  12. 2.0 5 km NE of Hormigueros, Puerto Rico
  13. 2.5 3 km NW of Mayagüez, Puerto Rico
  14. 1.9 7 km S of Tallaboa, Puerto Rico
  15. 1.6 8 km S of Tallaboa, 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 4.3 on 2017-10-14 — it released about 1,900 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.