QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8Md

4 km S of La Playa, Puerto Rico

· 28 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Añasco Municipio 7 kmRincón Municipio 13 kmHormigueros Municipio 14 kmAguada Municipio 15 kmMoca Municipio 18 kmSan Germán Municipio 21 kmLas Marías Municipio 22 kmSan Sebastián Municipio 24 kmAguadilla Municipio 27 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
28 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 7 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3758 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 18.2437, -67.1810. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 7 km (4 mi) SW of here earthquakes near Añasco Municipio
Rincón Municipio, PR 13 km (8 mi) SE of here earthquakes near Rincón Municipio
Hormigueros Municipio, PR 14 km (9 mi) NNW of here earthquakes near Hormigueros Municipio
Aguada Municipio, PR 15 km (9 mi) S of here earthquakes near Aguada Municipio
Moca Municipio, PR 18 km (11 mi) SW of here earthquakes near Moca Municipio
San Germán Municipio, PR 21 km (13 mi) NW 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

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

  1. 2.8 1 km NW of Las Marias, Puerto Rico
  2. 1.6 6 km SW of Liborio Negron Torres, Puerto Rico
  3. 2.2 10 km S of Guánica, Puerto Rico
  4. 1.6 3 km NNW of Sabana Grande, Puerto Rico
  5. 2.3 4 km N of Sabana Eneas, Puerto Rico
  6. 2.2 3 km NNE of Monte Grande, Puerto Rico
  7. 2.1 3 km NNW of Sabana Eneas, Puerto Rico
  8. 2.5 36 km WNW of Rincón, Puerto Rico
  9. 2.9 1 km ENE of Las Marias, Puerto Rico
  10. 2.3 5 km NNW of Puerto Real, Puerto Rico
  11. 2.0 22 km W of Puerto Real, Puerto Rico
  12. 3.0 19 km WSW of Stella, Puerto Rico
  13. 2.0 2 km E of La Parguera, Puerto Rico
  14. 2.1 5 km SW of Adjuntas, Puerto Rico
  15. 1.6 11 km E of Maricao, 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.