QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

Puerto Rico region

Yes. A magnitude 3.3 earthquake was recorded in the Puerto Rico region, at 7:46 pm AST on 11 November 2019 (23:46 UTC), 67 km deep. 2 people have reported feeling it to USGS.

· 67 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 106 kmFajardo Municipio 109 kmLuquillo 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 3.3 (md)
Depth
67 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Culebra Municipio, 106 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2475 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 1.3 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 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,300× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.6× 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.9 on 2018-11-14 — about 270 times the energy of this one.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 19.2646, -65.1191. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Culebra Municipio, PR 106 km (66 mi) S earthquakes near Culebra Municipio
Fajardo Municipio, PR 109 km (68 mi) SSW earthquakes near Fajardo Municipio
Luquillo Municipio, PR 117 km (73 mi) SSW earthquakes near Luquillo Municipio
Río Grande Municipio, PR 122 km (76 mi) SW earthquakes near Río Grande Municipio
Ceiba Municipio, PR 124 km (77 mi) SSW earthquakes near Ceiba Municipio
Loíza Municipio, PR 126 km (78 mi) SW earthquakes near Loíza Municipio

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

Aftershocks so far

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

  1. 3.6 86 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 3.6 79 km NNW of Charlotte Amalie, U.S. Virgin Islands
  3. 3.7 128 km NNE of Vieques, Puerto Rico
  4. 3.4 120 km NNE of Vieques, Puerto Rico
  5. 2.7 124 km NNE of Vieques, Puerto Rico
  6. 3.7 124 km NNE of Vieques, Puerto Rico
  7. 3.7 141 km NNE of Vieques, Puerto Rico
  8. 3.6 114 km NNE of Vieques, Puerto Rico
  9. 3.9 143 km NNE of Vieques, Puerto Rico
  10. 3.6 109 km NNE of Vieques, Puerto Rico
  11. 3.8 136 km NNE of Vieques, Puerto Rico
  12. 3.8 141 km NNE of Vieques, Puerto Rico
  13. 3.5 73 km N of Charlotte Amalie, U.S. Virgin Islands
  14. 3.2 80 km NNE of Luquillo, Puerto Rico
  15. 3.6 139 km NNE of Vieques, 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.

On USGS

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