QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

Puerto Rico region

· 25 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 73 kmRío Grande Municipio 77 kmFajardo Municipio 78 kmLuquillo Municipio 78 kmCarolina Municipio 78 kmSan Juan Municipio 80 kmCataño Municipio 81 kmToa Baja Municipio 83 kmCanóvanas Municipio 84 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 3.3 (md)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 73 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1516 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 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,400× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× 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 19.0717, -65.7503. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 73 km (45 mi) NNE of here earthquakes near Loíza Municipio
Río Grande Municipio, PR 77 km (48 mi) N of here earthquakes near Río Grande Municipio
Fajardo Municipio, PR 78 km (49 mi) NNW of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 78 km (49 mi) N of here earthquakes near Luquillo Municipio
Carolina Municipio, PR 78 km (49 mi) NNE of here earthquakes near Carolina Municipio
San Juan Municipio, PR 80 km (49 mi) NNE 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

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

  1. 3.5 68 km N of Culebra, Puerto Rico
  2. 3.8 118 km N of Suárez, Puerto Rico
  3. 3.9 98 km NNE of San Juan, Puerto Rico
  4. 3.7 119 km N of Suárez, Puerto Rico
  5. 3.5 116 km NNE of Suárez, Puerto Rico
  6. 3.3 102 km N of San Juan, Puerto Rico
  7. 3.1 79 km NNE of Vieques, Puerto Rico
  8. 3.6 80 km NNE of Vieques, Puerto Rico
  9. 3.5 74 km NNE of Vieques, Puerto Rico
  10. 3.4 30 km NNE of Vieques, Puerto Rico
  11. 3.4 42 km NNE of Luquillo, Puerto Rico
  12. 3.2 73 km N of Culebra, Puerto Rico
  13. 3.4 59 km N of San Juan, Puerto Rico
  14. 3.1 64 km NNE of Luquillo, Puerto Rico
  15. 3.3 112 km NNE 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 2016-09-04 — it released about 35 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.