QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

41 km N of Brenas, Puerto Rico

· 53 km deep · released about 550 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 41 kmVega Baja Municipio 43 kmVega Alta Municipio 45 kmToa Baja Municipio 45 kmManatí Municipio 47 kmBarceloneta Municipio 47 kmCataño Municipio 48 kmToa Alta Municipio 54 kmSan Juan Municipio 54 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 2.8 (md)
Depth
53 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 41 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1808 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 550 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 18.8383, -66.3368. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 41 km (26 mi) N of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 43 km (27 mi) N of here earthquakes near Vega Baja Municipio
Vega Alta Municipio, PR 45 km (28 mi) N of here earthquakes near Vega Alta Municipio
Toa Baja Municipio, PR 45 km (28 mi) NNW of here earthquakes near Toa Baja Municipio
Manatí Municipio, PR 47 km (29 mi) NNE of here earthquakes near Manatí Municipio
Barceloneta Municipio, PR 47 km (29 mi) NNE of here earthquakes near Barceloneta 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. 3.5 77 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 2.5 19 km N of San Juan, Puerto Rico
  3. 3.4 6 km N of Tierras Nuevas Poniente, Puerto Rico
  4. 3.1 3 km NE of Tierras Nuevas Poniente, Puerto Rico
  5. 3.1 35 km NNW of Brenas, Puerto Rico
  6. 2.9 2 km NNE of Levittown, Puerto Rico
  7. 3.2 57 km N of Hatillo, Puerto Rico
  8. 2.5 65 km N of Tierras Nuevas Poniente, Puerto Rico
  9. 3.5 81 km N of San Juan, Puerto Rico
  10. 3.1 71 km N of San Juan, Puerto Rico
  11. 3.9 68 km N of San Juan, Puerto Rico
  12. 3.0 54 km N of Carrizales, Puerto Rico
  13. 2.8 12 km NNW of Sabana, Puerto Rico
  14. 3.2 73 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.0 58 km N of San Juan, 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 870 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.