QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

1 km W of Adjuntas, Puerto Rico

· 21 km deep · released about 6.6 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 3 kmUtuado Municipio 13 kmPeñuelas Municipio 15 kmYauco Municipio 15 kmJayuya Municipio 17 kmGuayanilla Municipio 18 kmLares Municipio 19 kmMaricao Municipio 21 kmPonce Municipio 23 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 1.6 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 3 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2828 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 6.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.6 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 18.1611, -66.7391. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 3 km (2 mi) SE of here earthquakes near Adjuntas Municipio
Utuado Municipio, PR 13 km (8 mi) SSW of here earthquakes near Utuado Municipio
Peñuelas Municipio, PR 15 km (9 mi) N of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 15 km (9 mi) NE of here earthquakes near Yauco Municipio
Jayuya Municipio, PR 17 km (11 mi) WSW of here earthquakes near Jayuya Municipio
Guayanilla Municipio, PR 18 km (11 mi) NNE of here earthquakes near Guayanilla Municipio

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

Aftershocks so far

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

  1. 1.8 1 km S of San Germán, Puerto Rico
  2. 2.0 4 km S of Guánica, Puerto Rico
  3. 1.7 3 km SSE of Santa Isabel, Puerto Rico
  4. 2.3 4 km ENE of Hormigueros, Puerto Rico
  5. 1.5 3 km SE of La Parguera, Puerto Rico
  6. 1.8 4 km SE of Indios, Puerto Rico
  7. 2.1 1 km S of Guayanilla, Puerto Rico
  8. 1.9 11 km ESE of Maricao, Puerto Rico
  9. 1.5 1 km SSW of Liborio Negron Torres, Puerto Rico
  10. 1.8 3 km W of Rafael Capo, Puerto Rico
  11. 2.1 2 km NE of San Germán, Puerto Rico
  12. 2.0 3 km SW of Adjuntas, Puerto Rico
  13. 2.2 4 km ENE of Isabela, Puerto Rico
  14. 1.5 6 km E of La Parguera, Puerto Rico
  15. 1.8 8 km SSW of Guánica, 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.