QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

111 km N of Cruz Bay, U.S. Virgin Islands

Yes. A magnitude 2.0 earthquake was recorded 111 km N of Cruz Bay, U.S. Virgin Islands, at 2:51 am AST on 22 August 2017 (06:51 UTC), 34 km deep.

· 34 km deep · released about 36 lb of TNT

10 km30 km60 km120 km N
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 2.0 (md)
Depth
34 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 134 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3368 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 36 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 420,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 300,000× the energy of this one
  3. Around the size people start to feel M 3.0 27× the energy of this one
  4. This earthquake M 2.0 about 36 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 4.6 on 2016-01-15 — about 6,700 times the energy of this one.

Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.2 131 km NNE of Cruz Bay, U.S. Virgin Islands · 21 km NNE of this epicentre
  2. 6.1 91 km N of Charlotte Amalie, U.S. Virgin Islands · 30 km SW of this epicentre
  3. 6.0 112 km N of Charlotte Amalie, U.S. Virgin Islands · 35 km W of this epicentre
  4. 5.9 68 km N of Cruz Bay, U.S. Virgin Islands · 43 km SSW of this epicentre
  5. 5.9 65 km NNE of Cruz Bay, U.S. Virgin Islands · 48 km S 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 19.3245, -64.6011. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Culebra Municipio, PR 134 km (83 mi) SW earthquakes near Culebra Municipio
Fajardo Municipio, PR 147 km (91 mi) SW earthquakes near Fajardo Municipio
Luquillo Municipio, PR 158 km (98 mi) SW earthquakes near Luquillo Municipio
Ceiba Municipio, PR 160 km (100 mi) SW earthquakes near Ceiba Municipio

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

Aftershocks so far

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

  1. 3.2 84 km N of Cruz Bay, U.S. Virgin Islands
  2. 2.6 131 km N of Charlotte Amalie, U.S. Virgin Islands
  3. 2.5 91 km N of Cruz Bay, U.S. Virgin Islands
  4. 3.4 79 km NNE of Cruz Bay, U.S. Virgin Islands
  5. 3.7 102 km N of Cruz Bay, U.S. Virgin Islands
  6. 3.7 97 km NNE of Cruz Bay, U.S. Virgin Islands
  7. 3.6 81 km NNE of Cruz Bay, U.S. Virgin Islands
  8. 3.3 112 km N of Charlotte Amalie, U.S. Virgin Islands
  9. 3.6 119 km NNE of Cruz Bay, U.S. Virgin Islands
  10. 3.6 75 km N of Cruz Bay, U.S. Virgin Islands
  11. 3.0 88 km NNE of Cruz Bay, U.S. Virgin Islands
  12. 3.4 136 km N of Cruz Bay, U.S. Virgin Islands
  13. 3.4 96 km N of Cruz Bay, U.S. Virgin Islands
  14. 3.2 95 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 3.3 88 km NNE of Cruz Bay, 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.