QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

8 km NW of Adjuntas, Puerto Rico

· 2.5 km deep · released about 6.4 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 4 kmUtuado Municipio 10 kmLares Municipio 12 kmYauco Municipio 17 kmMaricao Municipio 17 kmJayuya Municipio 20 kmLas Marías Municipio 21 kmPeñuelas Municipio 22 kmSabana Grande 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
2.5 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 4 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 146 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 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 18.2152, -66.7767. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 4 km (3 mi) NNW of here earthquakes near Adjuntas Municipio
Utuado Municipio, PR 10 km (6 mi) SW of here earthquakes near Utuado Municipio
Lares Municipio, PR 12 km (7 mi) SE of here earthquakes near Lares Municipio
Yauco Municipio, PR 17 km (10 mi) NNE of here earthquakes near Yauco Municipio
Maricao Municipio, PR 17 km (11 mi) ENE of here earthquakes near Maricao Municipio
Jayuya Municipio, PR 20 km (12 mi) W of here earthquakes near Jayuya Municipio

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

Aftershocks so far

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

  1. 2.2 3 km WSW of Fuig, Puerto Rico
  2. 2.6 3 km WNW of Fuig, Puerto Rico
  3. 2.5 2 km WNW of Indios, Puerto Rico
  4. 2.1 2 km NW of Tallaboa, Puerto Rico
  5. 2.4 3 km E of Magas Arriba, Puerto Rico
  6. 2.5 4 km SSE of Maria Antonia, Puerto Rico
  7. 2.4 2 km SSW of Indios, Puerto Rico
  8. 2.5 2 km W of Indios, Puerto Rico
  9. 2.2 1 km NNE of Guayanilla, Puerto Rico
  10. 2.2 6 km SW of Liborio Negron Torres, Puerto Rico
  11. 2.2 0 km NNE of Maria Antonia, Puerto Rico
  12. 2.6 8 km SSE of Indios, Puerto Rico
  13. 2.1 2 km ESE of Palomas, Puerto Rico
  14. 2.3 1 km SE of Indios, Puerto Rico
  15. 3.2 3 km S of Cabo Rojo, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.4 on 2020-01-07 — it released about 19,000,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.