QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

4 km N of Brenas, Puerto Rico

· 77 km deep · released about 85 lb of TNT

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10 km30 km60 km120 km N Vega Alta Municipio 8 kmVega Baja Municipio 8 kmDorado Municipio 9 kmToa Baja Municipio 17 kmManatí Municipio 17 kmToa Alta Municipio 19 kmCataño Municipio 22 kmMorovis Municipio 23 kmCorozal 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 2.3 (md)
Depth
77 km below the surface
Felt
no reports yet
Nearest
Vega Alta Municipio, 8 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2695 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 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 18.5086, -66.3445. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Alta Municipio, PR 8 km (5 mi) N of here earthquakes near Vega Alta Municipio
Vega Baja Municipio, PR 8 km (5 mi) NE of here earthquakes near Vega Baja Municipio
Dorado Municipio, PR 9 km (6 mi) WNW of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 17 km (11 mi) WNW of here earthquakes near Toa Baja Municipio
Manatí Municipio, PR 17 km (11 mi) ENE of here earthquakes near Manatí Municipio
Toa Alta Municipio, PR 19 km (12 mi) NNW of here earthquakes near Toa Alta Municipio

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

Aftershocks so far

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

  1. 2.1 9 km NNW of Levittown, Puerto Rico
  2. 2.1 19 km N of Brenas, Puerto Rico
  3. 2.3 10 km NNE of Carrizales, Puerto Rico
  4. 2.1 Puerto Rico region
  5. 1.8 7 km NNW of Villalba, Puerto Rico
  6. 2.1 2 km ENE of Celada, Puerto Rico
  7. 1.9 16 km N of Tierras Nuevas Poniente, Puerto Rico
  8. 2.0 17 km N of Arecibo, Puerto Rico
  9. 1.6 11 km NNE of Hatillo, Puerto Rico
  10. 1.8 11 km NNW of San Juan, Puerto Rico
  11. 2.3 46 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 2.5 10 km NNE of Carrizales, Puerto Rico
  13. 2.3 25 km N of Brenas, Puerto Rico
  14. 2.0 19 km NNE of Tierras Nuevas Poniente, Puerto Rico
  15. 2.6 13 km NNW of Garrochales, 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 5,600 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.