QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6 km W of Maricao, Puerto Rico

· 34 km deep · released about 14 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 8 kmLas Marías Municipio 9 kmHormigueros Municipio 9 kmMaricao Municipio 11 kmSabana Grande Municipio 14 kmAñasco Municipio 15 kmSan Sebastián Municipio 19 kmLares Municipio 21 kmYauco Municipio 22 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 1.8 (md)
Depth
34 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 8 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2873 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 18.1776, -67.0405. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 8 km (5 mi) N of here earthquakes near San Germán Municipio
Las Marías Municipio, PR 9 km (5 mi) SW of here earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 9 km (6 mi) ENE of here earthquakes near Hormigueros Municipio
Maricao Municipio, PR 11 km (7 mi) W of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 14 km (9 mi) NW of here earthquakes near Sabana Grande Municipio
Añasco Municipio, PR 15 km (10 mi) SE of here earthquakes near Añasco 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 10 km SE of Pole Ojea, Puerto Rico
  2. 2.7 1 km SE of Stella, Puerto Rico
  3. 2.1 15 km S of Pole Ojea, Puerto Rico
  4. 1.9 17 km S of Pole Ojea, Puerto Rico
  5. 2.3 3 km SW of Stella, Puerto Rico
  6. 1.8 0 km N of Guayanilla, Puerto Rico
  7. 2.8 15 km W of Rincón, Puerto Rico
  8. 1.8 2 km SE of Maricao, Puerto Rico
  9. 2.5 7 km NNE of Isabela, Puerto Rico
  10. 3.0 19 km WNW of Aguadilla, Puerto Rico
  11. 1.8 23 km S of La Parguera, Puerto Rico
  12. 1.8 9 km S of Guánica, Puerto Rico
  13. 2.7 27 km WNW of Puerto Real, Puerto Rico
  14. 1.7 3 km NNW of Sabana Grande, Puerto Rico
  15. 2.1 0 km SSW of Mayagüez, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.