QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0md

110 km N of Brenas, Puerto Rico

· 11 km deep · released about 13 tons of TNT

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10 km30 km60 km120 km N Dorado Municipio 110 kmToa Baja Municipio 112 kmVega Baja Municipio 113 kmCataño Municipio 114 kmVega Alta Municipio 114 kmBarceloneta Municipio 115 kmManatí Municipio 116 kmSan Juan Municipio 117 kmLoíza Municipio 118 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 4.0 (md)
Depth
11 km below the surface
Felt
2 reports · strongest reported intensity I
Nearest
Dorado Municipio, 110 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 675 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 13 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 13,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 600× the energy of this one
  3. Magna, Utah 2020 M 5.7 420× the energy of this one
  4. This earthquake M 4.0 about 13 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 27× 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 19.4628, -66.2550. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 110 km (68 mi) N of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 112 km (70 mi) N of here earthquakes near Toa Baja Municipio
Vega Baja Municipio, PR 113 km (70 mi) N of here earthquakes near Vega Baja Municipio
Cataño Municipio, PR 114 km (71 mi) N of here earthquakes near Cataño Municipio
Vega Alta Municipio, PR 114 km (71 mi) N of here earthquakes near Vega Alta Municipio
Barceloneta Municipio, PR 115 km (71 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

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

  1. 3.0 72 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 3.0 81 km N of Brenas, Puerto Rico
  3. 3.3 77 km N of Brenas, Puerto Rico
  4. 3.1 87 km N of San Juan, Puerto Rico
  5. 3.1 79 km N of San Juan, Puerto Rico
  6. 3.5 78 km N of San Juan, Puerto Rico
  7. 3.1 85 km N of San Juan, Puerto Rico
  8. 3.9 83 km N of San Juan, Puerto Rico
  9. 3.2 83 km N of San Juan, Puerto Rico
  10. 3.3 68 km N of San Juan, Puerto Rico
  11. 3.3 67 km N of San Juan, Puerto Rico
  12. 3.4 84 km N of San Juan, Puerto Rico
  13. 3.3 114 km NNE of San Juan, Puerto Rico
  14. 3.2 74 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.3 116 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 4.4 on 2016-10-23 — it released about 4.7 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.