QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

23 km S of Charlotte Amalie, U.S. Virgin Islands

Yes. A magnitude 1.7 earthquake was recorded 23 km S of Charlotte Amalie, U.S. Virgin Islands, at 9:18 pm AST on 13 July 2017 (01:18 UTC), 19 km deep.

· 19 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 47 kmVieques Municipio 54 kmCeiba Municipio 75 kmFajardo Municipio 76 kmNaguabo Municipio 87 kmLuquillo Municipio 88 kmHumacao Municipio 91 kmRío Grande Municipio 97 kmYabucoa Municipio 100 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 1.7 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 47 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3407 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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

  1. 6.1 22 km NNE of Saint Croix, U.S. Virgin Islands · 39 km SE of this epicentre
  2. 5.0 29 km S of Cruz Bay, U.S. Virgin Islands · 19 km ESE 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 18.1256, -64.9205. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Culebra Municipio, PR 47 km (29 mi) WNW earthquakes near Culebra Municipio
Vieques Municipio, PR 54 km (34 mi) W earthquakes near Vieques Municipio
Ceiba Municipio, PR 75 km (47 mi) W earthquakes near Ceiba Municipio
Fajardo Municipio, PR 76 km (47 mi) WNW earthquakes near Fajardo Municipio
Naguabo Municipio, PR 87 km (54 mi) W earthquakes near Naguabo Municipio
Luquillo Municipio, PR 88 km (54 mi) WNW earthquakes near Luquillo Municipio

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

Aftershocks so far

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

  1. 3.1 21 km E of Cruz Bay, U.S. Virgin Islands
  2. 2.4 14 km SSE of Cruz Bay, U.S. Virgin Islands
  3. 3.2 10 km NNE of Charlotte Amalie, U.S. Virgin Islands
  4. 3.3 12 km S of Charlotte Amalie, U.S. Virgin Islands
  5. 2.9 18 km NNE of Cruz Bay, U.S. Virgin Islands
  6. 3.4 19 km NNE of Cruz Bay, U.S. Virgin Islands
  7. 3.4 Virgin Islands
  8. 3.5 37 km NE of Saint Croix, U.S. Virgin Islands
  9. 3.2 21 km NNE of Saint Croix, U.S. Virgin Islands
  10. 2.9 21 km SSW of Cruz Bay, U.S. Virgin Islands
  11. 3.4 18 km S of Charlotte Amalie, U.S. Virgin Islands
  12. 3.3 26 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 3.1 17 km ENE of Cruz Bay, U.S. Virgin Islands
  14. 2.5 21 km SE of Esperanza, Puerto Rico
  15. 3.3 25 km N of Charlotte Amalie, U.S. Virgin Islands

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.