QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

1 km ESE of Carolina, Puerto Rico

· 126 km deep · released about 4.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Carolina Municipio 4 kmCanóvanas Municipio 8 kmTrujillo Alto Municipio 8 kmLoíza Municipio 8 kmGurabo Municipio 12 kmSan Juan Municipio 14 kmRío Grande Municipio 15 kmJuncos Municipio 17 kmGuaynabo Municipio 18 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
126 km below the surface
Felt
no reports yet
Measured shaking
intensity II (ShakeMap)
Nearest
Carolina Municipio, 4 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 403 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 4.2 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 40,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,800× 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 4.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.8× 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 18.3751, -65.9426. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Carolina Municipio, PR 4 km (2 mi) SE of here earthquakes near Carolina Municipio
Canóvanas Municipio, PR 8 km (5 mi) NW of here earthquakes near Canóvanas Municipio
Trujillo Alto Municipio, PR 8 km (5 mi) NE of here earthquakes near Trujillo Alto Municipio
Loíza Municipio, PR 8 km (5 mi) S of here earthquakes near Loíza Municipio
Gurabo Municipio, PR 12 km (8 mi) NNE of here earthquakes near Gurabo Municipio
San Juan Municipio, PR 14 km (9 mi) ESE of here earthquakes near San Juan Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.9 2 km S of Cayey, Puerto Rico
  2. 1.9 2 km SE of Cidra, Puerto Rico
  3. 3.0 3 km SW of Vega Alta, Puerto Rico
  4. 2.5 6 km WNW of Aguas Buenas, Puerto Rico
  5. 2.7 3 km SSE of San Lorenzo, Puerto Rico
  6. 3.5 12 km NNE of Fajardo, Puerto Rico
  7. 2.2 3 km SSE of G. L. Garcia, Puerto Rico
  8. 2.8 2 km ENE of Parcelas Nuevas, Puerto Rico
  9. 2.6 21 km NNE of Dorado, Puerto Rico
  10. 3.6 20 km N of Dorado, Puerto Rico
  11. 1.8 5 km W of Rosa Sanchez, Puerto Rico
  12. 1.8 4 km E of Pastos, Puerto Rico
  13. 2.0 4 km SW of Jagual, Puerto Rico
  14. 2.1 4 km N of Orocovis, Puerto Rico
  15. 1.9 6 km ENE of Orocovis, 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 2019-05-02 — it released about 5.1 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.