QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6 km E of Maricao, Puerto Rico

· 39 km deep · released about 13 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 2 kmLas Marías Municipio 8 kmSabana Grande Municipio 11 kmLares Municipio 12 kmYauco Municipio 12 kmSan Germán Municipio 15 kmAdjuntas Municipio 17 kmSan Sebastián Municipio 18 kmHormigueros Municipio 21 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
39 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 2 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2765 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 13 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 18.1786, -66.9198. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 2 km (1 mi) ENE of here earthquakes near Maricao Municipio
Las Marías Municipio, PR 8 km (5 mi) SE of here earthquakes near Las Marías Municipio
Sabana Grande Municipio, PR 11 km (7 mi) NNE of here earthquakes near Sabana Grande Municipio
Lares Municipio, PR 12 km (8 mi) SSW of here earthquakes near Lares Municipio
Yauco Municipio, PR 12 km (8 mi) NNW of here earthquakes near Yauco Municipio
San Germán Municipio, PR 15 km (9 mi) ENE 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

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

  1. 1.9 2 km WSW of Liborio Negron Torres, Puerto Rico
  2. 1.5 3 km NNW of La Parguera, Puerto Rico
  3. 2.3 1 km WNW of Pole Ojea, Puerto Rico
  4. 2.2 1 km N of Pole Ojea, Puerto Rico
  5. 2.2 4 km NNE of Sabana Eneas, Puerto Rico
  6. 2.0 13 km SSE of Maria Antonia, Puerto Rico
  7. 1.5 5 km NW of Jayuya, Puerto Rico
  8. 2.2 1 km S of Ponce, Puerto Rico
  9. 2.0 Puerto Rico region
  10. 2.4 3 km NW of Aguadilla, Puerto Rico
  11. 1.7 9 km SSW of La Playa, Puerto Rico
  12. 1.7 10 km S of Guánica, Puerto Rico
  13. 1.8 9 km SSW of Guánica, Puerto Rico
  14. 1.9 0 km SSW of Adjuntas, Puerto Rico
  15. 2.1 1 km S of Adjuntas, 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.