QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

4 km N of Brenas, Puerto Rico

· 18 km deep · released about 82 lb of TNT

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10 km30 km60 km120 km N Vega Alta Municipio 8 kmVega Baja Municipio 8 kmDorado Municipio 9 kmManatí Municipio 17 kmToa Baja Municipio 17 kmToa Alta Municipio 19 kmCataño Municipio 22 kmMorovis Municipio 22 kmCorozal 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 2.3 (md)
Depth
18 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 37 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 82 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 12× the energy of this one
  4. This earthquake M 2.3 about 82 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 18.5032, -66.3463. 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
Manatí Municipio, PR 17 km (10 mi) ENE of here earthquakes near Manatí Municipio
Toa Baja Municipio, PR 17 km (11 mi) WNW of here earthquakes near Toa Baja Municipio
Toa Alta Municipio, PR 19 km (12 mi) NW 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

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

  1. 2.8 8 km NNE of Tierras Nuevas Poniente, Puerto Rico
  2. 2.8 13 km NNE of Carrizales, Puerto Rico
  3. 2.6 5 km NW of Guayabal, Puerto Rico
  4. 3.0 15 km N of Arecibo, Puerto Rico
  5. 2.8 43 km NNE of Arecibo, Puerto Rico
  6. 2.2 5 km WSW of Naranjito, Puerto Rico
  7. 2.8 10 km NNE of Tierras Nuevas Poniente, Puerto Rico
  8. 2.6 5 km N of Animas, Puerto Rico
  9. 3.1 36 km NNE of Arecibo, Puerto Rico
  10. 2.4 19 km NNE of Arecibo, 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 5,800 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.