QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

27 km NNW of Brenas, Puerto Rico

· 55 km deep · released about 990 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vega Baja Municipio 28 kmDorado Municipio 30 kmManatí Municipio 31 kmVega Alta Municipio 31 kmBarceloneta Municipio 31 kmToa Baja Municipio 36 kmCataño Municipio 40 kmFlorida Municipio 42 kmToa Alta Municipio 42 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 3.0 (md)
Depth
55 km below the surface
Felt
no reports yet
Nearest
Vega Baja Municipio, 28 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 977 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 990 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 340,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 990 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 18.7107, -66.4018. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Baja Municipio, PR 28 km (18 mi) N of here earthquakes near Vega Baja Municipio
Dorado Municipio, PR 30 km (19 mi) NNW of here earthquakes near Dorado Municipio
Manatí Municipio, PR 31 km (19 mi) NNE of here earthquakes near Manatí Municipio
Vega Alta Municipio, PR 31 km (19 mi) NNW of here earthquakes near Vega Alta Municipio
Barceloneta Municipio, PR 31 km (20 mi) NNE of here earthquakes near Barceloneta Municipio
Toa Baja Municipio, PR 36 km (22 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

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

  1. 3.0 1 km NNE of Manatí, Puerto Rico
  2. 2.9 17 km N of Arecibo, Puerto Rico
  3. 3.0 2 km E of Vega Alta, Puerto Rico
  4. 3.1 74 km N of Brenas, Puerto Rico
  5. 3.1 63 km N of Tierras Nuevas Poniente, Puerto Rico
  6. 3.1 18 km NNW of Brenas, Puerto Rico
  7. 3.0 12 km N of Hatillo, Puerto Rico
  8. 3.0 51 km N of Tierras Nuevas Poniente, Puerto Rico
  9. 3.2 64 km N of Carrizales, Puerto Rico
  10. 3.3 68 km N of Brenas, Puerto Rico
  11. 3.0 11 km NNE of Carrizales, Puerto Rico
  12. 2.5 15 km N of Arecibo, Puerto Rico
  13. 3.0 14 km N of Hatillo, Puerto Rico
  14. 2.4 10 km N of Arecibo, Puerto Rico
  15. 3.0 7 km NNE 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 480 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.