QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

12 km NNW of Brenas, Puerto Rico

· 39 km deep · released about 7.1 lb of TNT

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10 km30 km60 km120 km N Vega Baja Municipio 14 kmVega Alta Municipio 16 kmDorado Municipio 17 kmManatí Municipio 19 kmBarceloneta Municipio 23 kmToa Baja Municipio 24 kmToa Alta Municipio 28 kmCataño Municipio 28 kmMorovis Municipio 29 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
39 km below the surface
Felt
no reports yet
Nearest
Vega Baja Municipio, 14 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3013 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 7.1 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 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× 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 7.1 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 18.5788, -66.3775. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Baja Municipio, PR 14 km (9 mi) N of here earthquakes near Vega Baja Municipio
Vega Alta Municipio, PR 16 km (10 mi) NNW of here earthquakes near Vega Alta Municipio
Dorado Municipio, PR 17 km (10 mi) NW of here earthquakes near Dorado Municipio
Manatí Municipio, PR 19 km (12 mi) NE of here earthquakes near Manatí Municipio
Barceloneta Municipio, PR 23 km (14 mi) ENE of here earthquakes near Barceloneta Municipio
Toa Baja Municipio, PR 24 km (15 mi) NW of here earthquakes near Toa Baja Municipio

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

Aftershocks so far

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

  1. 2.2 11 km N of Arecibo, Puerto Rico
  2. 2.5 19 km N of Arecibo, Puerto Rico
  3. 2.6 3 km SSE of Guaynabo, Puerto Rico
  4. 2.8 31 km N of Tierras Nuevas Poniente, Puerto Rico
  5. 2.5 23 km N of Carrizales, Puerto Rico
  6. 2.4 33 km NNW of Tierras Nuevas Poniente, Puerto Rico
  7. 2.8 3 km NNE of Naranjito, Puerto Rico
  8. 2.8 50 km N of San Juan, Puerto Rico
  9. 2.0 1 km NE of Sabana Seca, Puerto Rico
  10. 2.2 44 km NNE of Carrizales, Puerto Rico
  11. 2.9 5 km SE of Cataño, Puerto Rico
  12. 2.1 7 km E of Naranjito, Puerto Rico
  13. 1.8 3 km NE of Hatillo, Puerto Rico
  14. 2.3 18 km NNE of Arecibo, Puerto Rico
  15. 2.5 33 km N of Tierras Nuevas Poniente, 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 4.8 on 2017-08-18 — it released about 68,000 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.