QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

5 km WNW of Las Marías, Puerto Rico

· 24 km deep · released about 19 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 9 kmSan Sebastián Municipio 9 kmAñasco Municipio 10 kmMoca Municipio 12 kmMaricao Municipio 16 kmLares Municipio 18 kmHormigueros Municipio 18 kmAguada Municipio 19 kmSan Germán 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 1.9 (md)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 9 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2836 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 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 18.2813, -67.0388. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 9 km (5 mi) NW of here earthquakes near Las Marías Municipio
San Sebastián Municipio, PR 9 km (6 mi) SW of here earthquakes near San Sebastián Municipio
Añasco Municipio, PR 10 km (6 mi) E of here earthquakes near Añasco Municipio
Moca Municipio, PR 12 km (7 mi) SSE of here earthquakes near Moca Municipio
Maricao Municipio, PR 16 km (10 mi) NW of here earthquakes near Maricao Municipio
Lares Municipio, PR 18 km (11 mi) W of here earthquakes near Lares Municipio

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

Aftershocks so far

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

  1. 1.7 4 km NNE of Yauco, Puerto Rico
  2. 2.3 22 km NW of Rincón, Puerto Rico
  3. 1.7 13 km SSE of La Parguera, Puerto Rico
  4. 2.5 5 km ENE of Mayagüez, Puerto Rico
  5. 1.8 6 km NNW of Jayuya, Puerto Rico
  6. 2.1 0 km NE of La Parguera, Puerto Rico
  7. 1.6 11 km S of La Parguera, Puerto Rico
  8. 2.3 1 km S of Las Marías, Puerto Rico
  9. 1.6 1 km W of Adjuntas, Puerto Rico
  10. 2.1 1 km SW of Guayanilla, Puerto Rico
  11. 1.9 0 km NNW of Puerto Real, Puerto Rico
  12. 2.3 8 km WSW of Mayagüez, Puerto Rico
  13. 2.8 25 km NW of Rincón, Puerto Rico
  14. 2.8 21 km NW of San Antonio, Puerto Rico
  15. 2.3 7 km NNW 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 4,600 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.