QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3md

113 km NNE of San Juan, Puerto Rico

· 28 km deep · released about 51 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 113 kmCataño Municipio 118 kmToa Baja Municipio 118 kmSan Juan Municipio 118 kmDorado Municipio 118 kmCarolina Municipio 119 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 4.3 (md)
Depth
28 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Loíza Municipio, 113 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1300 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 51 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 3,300× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 150× the energy of this one
  3. Magna, Utah 2020 M 5.7 110× the energy of this one
  4. This earthquake M 4.3 about 51 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 110× 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 19.4615, -65.8443. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 113 km (70 mi) N of here earthquakes near Loíza Municipio
Cataño Municipio, PR 118 km (73 mi) NNE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 118 km (73 mi) NNE of here earthquakes near Toa Baja Municipio
San Juan Municipio, PR 118 km (73 mi) NNE of here earthquakes near San Juan Municipio
Dorado Municipio, PR 118 km (73 mi) NNE of here earthquakes near Dorado Municipio
Carolina Municipio, PR 119 km (74 mi) N of here earthquakes near Carolina 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. 4.1 139 km N of Suárez, Puerto Rico
  2. 4.1 132 km N of Suárez, Puerto Rico
  3. 4.0 109 km N of Suárez, Puerto Rico
  4. 4.0 Puerto Rico region
  5. 4.1 141 km N of Suárez, Puerto Rico
  6. 4.0 128 km N of Suárez, Puerto Rico
  7. 3.9 124 km N of Suárez, Puerto Rico
  8. 3.6 118 km N of Suárez, Puerto Rico
  9. 3.4 132 km N of Suárez, Puerto Rico
  10. 3.7 113 km N of Suárez, Puerto Rico
  11. 3.4 Puerto Rico region
  12. 3.2 78 km N of San Juan, Puerto Rico
  13. 2.9 87 km N of Brenas, Puerto Rico
  14. 3.4 109 km N of Brenas, Puerto Rico
  15. 3.9 138 km N of Suárez, 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 4.1 on 2022-12-09.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.