QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6Md

5 km SSW of Adjuntas, Puerto Rico

· 20 km deep · released about 7.6 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 7 kmPeñuelas Municipio 11 kmYauco Municipio 13 kmGuayanilla Municipio 14 kmUtuado Municipio 17 kmJayuya Municipio 19 kmPonce Municipio 20 kmMaricao Municipio 21 kmLares 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 1.6 (Md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 7 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3588 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 7.6 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 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 18.1205, -66.7433. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 7 km (4 mi) SSE of here earthquakes near Adjuntas Municipio
Peñuelas Municipio, PR 11 km (7 mi) N of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 13 km (8 mi) ENE of here earthquakes near Yauco Municipio
Guayanilla Municipio, PR 14 km (9 mi) NNE of here earthquakes near Guayanilla Municipio
Utuado Municipio, PR 17 km (11 mi) SSW of here earthquakes near Utuado Municipio
Jayuya Municipio, PR 19 km (12 mi) WSW of here earthquakes near Jayuya 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. 2.1 6 km ENE of La Parguera, Puerto Rico
  2. 2.4 5 km NNE of San Germán, Puerto Rico
  3. 2.0 26 km S of Guánica, Puerto Rico
  4. 2.2 3 km S of Coamo, Puerto Rico
  5. 1.9 7 km SE of Pole Ojea, Puerto Rico
  6. 1.6 5 km W of Hormigueros, Puerto Rico
  7. 2.0 2 km SSE of Magas Arriba, Puerto Rico
  8. 1.8 4 km WNW of Mayagüez, Puerto Rico
  9. 1.9 15 km S of Guánica, Puerto Rico
  10. 2.1 5 km NNE of Sabana Eneas, Puerto Rico
  11. 2.5 0 km S of Hormigueros, Puerto Rico
  12. 2.2 8 km SW of La Parguera, Puerto Rico
  13. 2.5 18 km S of Tallaboa, Puerto Rico
  14. 1.5 0 km E of San Germán, Puerto Rico
  15. 2.4 0 km WNW of Mariano Colón, 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

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