QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

Puerto Rico region

· 39 km deep · released about 4.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 108 kmCataño Municipio 113 kmToa Baja Municipio 113 kmSan Juan Municipio 113 kmDorado Municipio 114 kmCarolina Municipio 114 kmRío Grande Municipio 115 kmLuquillo Municipio 117 kmFajardo Municipio 117 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 3.6 (md)
Depth
39 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 108 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1095 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 4.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 42,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,300× the energy of this one
  4. This earthquake M 3.6 about 4.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.5× 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 19.4138, -65.8300. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 108 km (67 mi) N of here earthquakes near Loíza Municipio
Cataño Municipio, PR 113 km (70 mi) NNE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 113 km (70 mi) NNE of here earthquakes near Toa Baja Municipio
San Juan Municipio, PR 113 km (70 mi) NNE of here earthquakes near San Juan Municipio
Dorado Municipio, PR 114 km (71 mi) NNE of here earthquakes near Dorado Municipio
Carolina Municipio, PR 114 km (71 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

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

  1. 3.7 131 km NNE of San Juan, Puerto Rico
  2. 3.3 89 km N of Suárez, Puerto Rico
  3. 3.9 123 km N of Suárez, Puerto Rico
  4. 3.9 98 km N of Brenas, Puerto Rico
  5. 3.9 111 km N of Brenas, Puerto Rico
  6. 3.4 104 km NNE of San Juan, Puerto Rico
  7. 3.8 129 km N of Su?rez, Puerto Rico
  8. 3.5 124 km N of San Juan, Puerto Rico
  9. 3.1 Puerto Rico region
  10. 3.6 132 km N of Suárez, Puerto Rico
  11. 4.0 111 km N of San Juan, Puerto Rico
  12. 3.3 95 km NNE of Suárez, Puerto Rico
  13. 3.8 115 km N of San Juan, Puerto Rico
  14. 3.7 120 km N of San Juan, Puerto Rico
  15. 3.8 127 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 4.3 on 2022-12-25 — it released about 12 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.