QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km W of Las Marías, Puerto Rico

· 32 km deep · released about 47 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 5 kmSan Sebastián Municipio 10 kmMaricao Municipio 12 kmAñasco Municipio 13 kmMoca Municipio 16 kmSan Germán Municipio 16 kmLares Municipio 16 kmHormigueros Municipio 16 kmSabana Grande 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 2.1 (md)
Depth
32 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 5 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3268 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 47 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 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 18.2488, -67.0178. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 5 km (3 mi) WNW of here earthquakes near Las Marías Municipio
San Sebastián Municipio, PR 10 km (7 mi) SSW of here earthquakes near San Sebastián Municipio
Maricao Municipio, PR 12 km (7 mi) NW of here earthquakes near Maricao Municipio
Añasco Municipio, PR 13 km (8 mi) ESE of here earthquakes near Añasco Municipio
Moca Municipio, PR 16 km (10 mi) SSE of here earthquakes near Moca Municipio
San Germán Municipio, PR 16 km (10 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

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

  1. 2.5 16 km SW of Stella, Puerto Rico
  2. 1.9 Mona Passage
  3. 2.2 Puerto Rico region
  4. 3.1 17 km NW of Rincón, Puerto Rico
  5. 2.6 Mona Passage
  6. 2.2 2 km S of Guánica, Puerto Rico
  7. 2.7 21 km SW of Stella, Puerto Rico
  8. 1.6 0 km SE of Fuig, Puerto Rico
  9. 1.6 Puerto Rico region
  10. 2.0 15 km SSW of Stella, Puerto Rico
  11. 2.7 11 km E of Maricao, Puerto Rico
  12. 1.7 2 km SE of Maria Antonia, Puerto Rico
  13. 2.3 3 km WNW of Santo Domingo, Puerto Rico
  14. 2.7 19 km NW of San Antonio, Puerto Rico
  15. 2.5 11 km WNW of Puerto Real, 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 1,800 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.