QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

13 km E of Maricao, Puerto Rico

· 22 km deep · released about 16 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 9 kmYauco Municipio 9 kmAdjuntas Municipio 10 kmLares Municipio 12 kmSabana Grande Municipio 14 kmLas Marías Municipio 15 kmGuayanilla Municipio 19 kmUtuado Municipio 19 kmSan Germán 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
22 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 9 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2777 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 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 18.1706, -66.8535. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 9 km (5 mi) E of here earthquakes near Maricao Municipio
Yauco Municipio, PR 9 km (6 mi) N of here earthquakes near Yauco Municipio
Adjuntas Municipio, PR 10 km (6 mi) W of here earthquakes near Adjuntas Municipio
Lares Municipio, PR 12 km (7 mi) S of here earthquakes near Lares Municipio
Sabana Grande Municipio, PR 14 km (9 mi) NE of here earthquakes near Sabana Grande Municipio
Las Marías Municipio, PR 15 km (9 mi) ESE of here earthquakes near Las Marías 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. 1.8 3 km W of La Playa, Puerto Rico
  2. 2.2 7 km WSW of Maricao, Puerto Rico
  3. 2.5 2 km S of Las Marías, Puerto Rico
  4. 2.1 11 km WNW of Puerto Real, Puerto Rico
  5. 1.9 10 km SSE of Tallaboa, Puerto Rico
  6. 1.9 1 km S of Lajas, Puerto Rico
  7. 2.4 7 km NNW of Puerto Real, Puerto Rico
  8. 1.7 3 km WNW of Cabo Rojo, Puerto Rico
  9. 2.6 5 km W of Mayagüez, Puerto Rico
  10. 1.6 5 km WSW of Palmarejo, Puerto Rico
  11. 2.4 13 km S of Pole Ojea, Puerto Rico
  12. 2.2 8 km S of Pole Ojea, Puerto Rico
  13. 2.1 6 km N of San Sebastián, Puerto Rico
  14. 2.2 9 km SW of La Parguera, Puerto Rico
  15. 1.9 5 km W of Hormigueros, 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.