QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

103 km N of Culebra, Puerto Rico

Yes. A magnitude 2.3 earthquake was recorded 103 km N of Culebra, Puerto Rico, at 9:54 am AST on 6 June 2017 (13:54 UTC), 75 km deep.

· 75 km deep · released about 88 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 100 kmCulebra Municipio 102 kmLuquillo Municipio 107 kmRío Grande Municipio 111 kmLoíza Municipio 113 kmCeiba Municipio 115 kmCarolina Municipio 119 kmCanóvanas Municipio 120 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 2.3 (md)
Depth
75 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 100 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3444 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause 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 88 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 lb of TNT

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 970 times the energy of this one.

Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.1 91 km N of Charlotte Amalie, U.S. Virgin Islands · 47 km E of this epicentre
  2. 6.0 112 km N of Charlotte Amalie, U.S. Virgin Islands · 38 km ENE of this epicentre
  3. 5.6 112 km N of Charlotte Amalie, U.S. Virgin Islands · 43 km ENE of this epicentre
  4. 5.1 107 km N of Charlotte Amalie, U.S. Virgin Islands · 35 km ENE of this epicentre
  5. 5.1 122 km NNE of Vieques, Puerto Rico · 19 km N 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 19.2393, -65.2768. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Fajardo Municipio, PR 100 km (62 mi) SSW earthquakes near Fajardo Municipio
Culebra Municipio, PR 102 km (63 mi) S earthquakes near Culebra Municipio
Luquillo Municipio, PR 107 km (67 mi) SSW earthquakes near Luquillo Municipio
Río Grande Municipio, PR 111 km (69 mi) SSW earthquakes near Río Grande Municipio
Loíza Municipio, PR 113 km (70 mi) SW earthquakes near Loíza Municipio
Ceiba Municipio, PR 115 km (72 mi) SSW earthquakes near Ceiba 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. 3.2 75 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 2.1 67 km NNW of Charlotte Amalie, U.S. Virgin Islands
  3. 1.9 93 km N of Culebra, Puerto Rico
  4. 3.2 112 km NNE of Vieques, Puerto Rico
  5. 2.3 96 km NNW of Charlotte Amalie, U.S. Virgin Islands
  6. 3.2 108 km NNE of Vieques, Puerto Rico
  7. 2.8 80 km NNW of Charlotte Amalie, U.S. Virgin Islands
  8. 2.3 102 km NNE of Vieques, Puerto Rico
  9. 2.4 54 km N of Culebra, Puerto Rico
  10. 2.1 68 km N of Culebra, Puerto Rico
  11. 2.9 102 km N of Charlotte Amalie, U.S. Virgin Islands
  12. 2.7 68 km N of Culebra, Puerto Rico
  13. 2.1 88 km N of Charlotte Amalie, U.S. Virgin Islands
  14. 2.0 68 km N of Culebra, Puerto Rico
  15. 2.7 62 km NNE of Luquillo, 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.