QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

2 km W of Mariano Colón, Puerto Rico

· 12 km deep · released about 9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Isabel Municipio 8 kmCoamo Municipio 9 kmSalinas Municipio 11 kmJuana Díaz Municipio 14 kmAibonito Municipio 16 kmVillalba Municipio 17 kmBarranquitas Municipio 20 kmOrocovis Municipio 24 kmCayey Municipio 24 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
12 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 8 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 836 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 9 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 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 9 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 18.0215, -66.3570. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 8 km (5 mi) NNE of here earthquakes near Santa Isabel Municipio
Coamo Municipio, PR 9 km (6 mi) S of here earthquakes near Coamo Municipio
Salinas Municipio, PR 11 km (7 mi) WNW of here earthquakes near Salinas Municipio
Juana Díaz Municipio, PR 14 km (9 mi) E of here earthquakes near Juana Díaz Municipio
Aibonito Municipio, PR 16 km (10 mi) SW of here earthquakes near Aibonito Municipio
Villalba Municipio, PR 17 km (11 mi) SE of here earthquakes near Villalba Municipio

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

Aftershocks so far

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

  1. 2.5 3 km SW of G. L. Garcia, Puerto Rico
  2. 2.6 4 km WNW of Orocovis, Puerto Rico
  3. 2.4 11 km S of Salinas, Puerto Rico
  4. 3.3 6 km WSW of Estancias de Florida, Puerto Rico
  5. 2.5 6 km NE of Tallaboa Alta, Puerto Rico
  6. 2.3 3 km SSW of Tallaboa, Puerto Rico
  7. 2.5 5 km S of Magas Arriba, Puerto Rico
  8. 2.2 9 km SSE of Indios, Puerto Rico
  9. 3.0 1 km NNE of Manatí, Puerto Rico
  10. 2.6 4 km SE of Jauca, Puerto Rico
  11. 2.6 4 km ESE of Tallaboa, Puerto Rico
  12. 2.9 26 km SSE of Arroyo, Puerto Rico
  13. 2.3 3 km WNW of Orocovis, Puerto Rico
  14. 2.7 5 km SSW of Tallaboa, Puerto Rico
  15. 2.5 11 km S of Salinas, 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 13,000,000 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.