QuakeIndex

Earthquake · reviewed by a seismologist

M 4.4ml

36 km N of Brenas, Puerto Rico

· 62 km deep · released about 60 tons of TNT

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10 km30 km60 km120 km N Vega Baja Municipio 38 kmDorado Municipio 38 kmVega Alta Municipio 40 kmBarceloneta Municipio 41 kmManatí Municipio 41 kmToa Baja Municipio 43 kmCataño Municipio 46 kmToa Alta Municipio 50 kmArecibo Municipio 51 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 4.4 (ml)
Depth
62 km below the surface
Felt
39 reports · strongest reported intensity IV
Nearest
Vega Baja Municipio, 38 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2780 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 39 people have reported feeling it to USGS.

How big was it?

This earthquake released about 60 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,800× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 130× the energy of this one
  3. Magna, Utah 2020 M 5.7 89× the energy of this one
  4. This earthquake M 4.4 about 60 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 130× more

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 18.7953, -66.3821. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Baja Municipio, PR 38 km (24 mi) N of here earthquakes near Vega Baja Municipio
Dorado Municipio, PR 38 km (24 mi) NNW of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 40 km (25 mi) N of here earthquakes near Vega Alta Municipio
Barceloneta Municipio, PR 41 km (25 mi) NNE of here earthquakes near Barceloneta Municipio
Manatí Municipio, PR 41 km (25 mi) NNE of here earthquakes near Manatí Municipio
Toa Baja Municipio, PR 43 km (26 mi) NNW 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

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

  1. 2.1 37 km N of San Juan, Puerto Rico
  2. 2.4 13 km N of Carrizales, Puerto Rico
  3. 1.5 18 km NNE of Tierras Nuevas Poniente, Puerto Rico
  4. 2.5 12 km N of Brenas, Puerto Rico
  5. 2.6 32 km N of Garrochales, Puerto Rico
  6. 2.4 34 km N of Arecibo, Puerto Rico
  7. 2.8 71 km N of San Juan, Puerto Rico
  8. 2.6 70 km N of San Juan, Puerto Rico
  9. 2.7 72 km N of San Juan, Puerto Rico
  10. 2.7 73 km N of San Juan, Puerto Rico
  11. 2.8 72 km N of San Juan, Puerto Rico
  12. 1.6 19 km N of Tierras Nuevas Poniente, Puerto Rico
  13. 2.8 1 km SSW of Levittown, Puerto Rico
  14. 2.8 0 km NE of La Luisa, Puerto Rico
  15. 2.5 19 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 4 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.