QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

58 km NNE of Vieques, Puerto Rico

Yes. A magnitude 3.2 earthquake was recorded 58 km NNE of Vieques, Puerto Rico, 72 km (45 mi) NE of San Juan, PR, at 5:36 am AST on 2 January 2019 (09:36 UTC), 49 km deep.

72 km (45 mi) NE of San Juan, PR

· 49 km deep · released about 2,000 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 60 kmLoíza Municipio 61 kmLuquillo Municipio 62 kmRío Grande Municipio 63 kmCarolina Municipio 67 kmCanóvanas Municipio 70 kmSan Juan Municipio 71 kmCeiba Municipio 74 kmCataño Municipio 75 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 3.2 (md)
Depth
49 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 60 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2805 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 2,000 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 170,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,400× the energy of this one
  4. This earthquake M 3.2 about 2,000 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2.1× 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 since 2016 was M 4.3 on 2016-09-04 — about 43 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 92 km N of Suárez, Puerto Rico · 38 km NNW of this epicentre
  2. 5.0 73 km NNE of Vieques, Puerto Rico · 18 km ENE of this epicentre

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 18.9221, -65.6495. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Fajardo Municipio, PR 60 km (37 mi) S earthquakes near Fajardo Municipio
Loíza Municipio, PR 61 km (38 mi) SSW earthquakes near Loíza Municipio
Luquillo Municipio, PR 62 km (38 mi) S earthquakes near Luquillo Municipio
Río Grande Municipio, PR 63 km (39 mi) SSW earthquakes near Río Grande Municipio
Carolina Municipio, PR 67 km (42 mi) SSW earthquakes near Carolina Municipio
Canóvanas Municipio, PR 70 km (44 mi) SSW earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 2.4 30 km NNE of Luquillo, Puerto Rico
  2. 3.1 47 km N of Culebra, Puerto Rico
  3. 3.0 Puerto Rico region
  4. 2.2 56 km NNE of Luquillo, Puerto Rico
  5. 2.9 81 km N of San Juan, Puerto Rico
  6. 3.3 84 km N of Suárez, Puerto Rico
  7. 3.0 75 km NNE of Luquillo, Puerto Rico
  8. 3.1 59 km N of Culebra, Puerto Rico
  9. 3.0 36 km N of Suárez, Puerto Rico
  10. 2.9 29 km NE of Fajardo, Puerto Rico
  11. 3.0 78 km NNE of Luquillo, Puerto Rico
  12. 2.6 72 km NNE of Luquillo, Puerto Rico
  13. 2.8 76 km N of Culebra, Puerto Rico
  14. 2.9 70 km NNE of Luquillo, Puerto Rico
  15. 2.8 74 km N of Culebra, 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.