QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

6 km SW of Adjuntas, Puerto Rico

· 16 km deep · released about 19 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 6 kmYauco Municipio 10 kmPeñuelas Municipio 12 kmGuayanilla Municipio 14 kmUtuado Municipio 18 kmMaricao Municipio 18 kmSabana Grande Municipio 19 kmLares Municipio 19 kmJayuya 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 1.9 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 6 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2696 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 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× 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 18.1288, -66.7745. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 6 km (4 mi) SSW of here earthquakes near Adjuntas Municipio
Yauco Municipio, PR 10 km (6 mi) ENE of here earthquakes near Yauco Municipio
Peñuelas Municipio, PR 12 km (8 mi) NNW of here earthquakes near Peñuelas Municipio
Guayanilla Municipio, PR 14 km (9 mi) N of here earthquakes near Guayanilla Municipio
Utuado Municipio, PR 18 km (11 mi) SSW of here earthquakes near Utuado Municipio
Maricao Municipio, PR 18 km (11 mi) ESE of here earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 1.8 7 km NE of Sabana Grande, Puerto Rico
  2. 2.0 5 km NNE of Sabana Grande, Puerto Rico
  3. 2.2 5 km NE of Sabana Grande, Puerto Rico
  4. 1.8 3 km NE of Sabana Grande, Puerto Rico
  5. 2.7 3 km N of Juncal, Puerto Rico
  6. 2.2 2 km WSW of Maricao, Puerto Rico
  7. 2.1 15 km SSE of Guánica, Puerto Rico
  8. 2.6 6 km SE of Aceitunas, Puerto Rico
  9. 1.9 6 km W of Maricao, Puerto Rico
  10. 2.1 Mona Passage
  11. 1.9 5 km W of Las Marías, Puerto Rico
  12. 1.6 3 km SSE of Palmarejo, Puerto Rico
  13. 1.9 14 km S of La Parguera, Puerto Rico
  14. 2.0 18 km S of Guánica, Puerto Rico
  15. 1.9 21 km S of La Parguera, 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.