Earthquake · reviewed by a seismologist
M 1.9Md
76 km NE of Cruz Bay, U.S. Virgin Islands
Yes. A magnitude 1.9 earthquake was recorded 76 km NE of Cruz Bay, U.S. Virgin Islands, at 10:29 pm AST on 16 April 2017 (02:29 UTC), 7.0 km deep.
- When
- Magnitude
- M 1.9 (Md)
- Depth
- 7.0 km below the surface
- Felt
- no reports yet
- Nearest
- Culebra Municipio, 118 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3496 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 13 km (8 mi) from the epicentre. 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
- Magna, Utah 2020 M 5.7 500,000× the energy of this one
- Around the size people start to feel M 3.0 45× the energy of this one
- This earthquake M 1.9 about 21 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 2016-08-27 — about 4,000 times the energy of this one.
Before 2016, the USGS record lists 8 earthquakes of M5 or more within 50 km; the five largest:
- 5.9 68 km N of Cruz Bay, U.S. Virgin Islands · 39 km WNW of this epicentre
- 5.9 65 km NNE of Cruz Bay, U.S. Virgin Islands · 25 km W of this epicentre
- 5.7 80 km NNE of Cruz Bay, U.S. Virgin Islands · 30 km NW of this epicentre
- 5.3 78 km NNE of Cruz Bay, U.S. Virgin Islands · 36 km WNW of this epicentre
- 5.3 97 km N of Cruz Bay, U.S. Virgin Islands · 49 km NW 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 18.8666, -64.3407. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Culebra Municipio, PR | 118 km (74 mi) | WSW | earthquakes near Culebra Municipio |
| Vieques Municipio, PR | 142 km (88 mi) | SW | earthquakes near Vieques Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
39 earthquakes have been recorded within 50 km since this one.
- 2.7 71 km NE of Cruz Bay, U.S. Virgin Islands
- 2.7 55 km NE of Cruz Bay, U.S. Virgin Islands
- 2.1 80 km ENE of Cruz Bay, U.S. Virgin Islands
- 2.7 57 km N of Cruz Bay, U.S. Virgin Islands
- 2.2 108 km NE of Cruz Bay, U.S. Virgin Islands
- 2.8 96 km NNE of Cruz Bay, U.S. Virgin Islands
- 2.6 111 km NE of Cruz Bay, U.S. Virgin Islands
- 2.8 106 km NE of Cruz Bay, U.S. Virgin Islands
- 2.6 88 km NE of Cruz Bay, U.S. Virgin Islands
- 2.2 67 km NE of Cruz Bay, U.S. Virgin Islands
- 2.3 68 km ENE of Cruz Bay, U.S. Virgin Islands
- 2.2 91 km NNE of Cruz Bay, U.S. Virgin Islands
- 2.2 61 km NE of Cruz Bay, U.S. Virgin Islands
- 2.0 56 km NNE of Cruz Bay, U.S. Virgin Islands
- 3.0 69 km N 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.