Earthquake · reviewed by a seismologist
M 1.6Md
66 km N of Charlotte Amalie, U.S. Virgin Islands
Yes. A magnitude 1.6 earthquake was recorded 66 km N of Charlotte Amalie, U.S. Virgin Islands, at 2:02 pm AST on 13 April 2017 (18:02 UTC), 8.0 km deep.
- When
- Magnitude
- M 1.6 (Md)
- Depth
- 8.0 km below the surface
- Felt
- no reports yet
- Nearest
- Culebra Municipio, 73 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3499 days ago
Earthquake alerts for Culebra, PR
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 8 km (5 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.6 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 11,000 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 6.1 91 km N of Charlotte Amalie, U.S. Virgin Islands · 33 km NE of this epicentre
- 6.0 112 km N of Charlotte Amalie, U.S. Virgin Islands · 48 km NNE of this epicentre
- 5.9 68 km N of Cruz Bay, U.S. Virgin Islands · 35 km E of this epicentre
- 5.9 65 km NNE of Cruz Bay, U.S. Virgin Islands · 48 km E of this epicentre
- 5.7 80 km NNE of Cruz Bay, U.S. Virgin Islands · 49 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 18.9325, -65.0343. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Culebra Municipio, PR | 73 km (46 mi) | SSW | earthquakes near Culebra Municipio |
| Fajardo Municipio, PR | 84 km (52 mi) | SW | earthquakes near Fajardo Municipio |
| Luquillo Municipio, PR | 95 km (59 mi) | SW | earthquakes near Luquillo Municipio |
| Ceiba Municipio, PR | 98 km (61 mi) | SW | earthquakes near Ceiba Municipio |
| Vieques Municipio, PR | 99 km (62 mi) | SSW | earthquakes near Vieques Municipio |
| Río Grande Municipio, PR | 102 km (63 mi) | SW | earthquakes near Río Grande 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.
- 2.1 100 km N of Cruz Bay, U.S. Virgin Islands
- 2.4 81 km N of Charlotte Amalie, U.S. Virgin Islands
- 2.1 92 km N of Cruz Bay, U.S. Virgin Islands
- 2.6 97 km N of Charlotte Amalie, U.S. Virgin Islands
- 2.9 80 km N of Cruz Bay, U.S. Virgin Islands
- 2.0 95 km N of Cruz Bay, U.S. Virgin Islands
- 2.3 103 km N of Charlotte Amalie, U.S. Virgin Islands
- 2.0 56 km N of Charlotte Amalie, U.S. Virgin Islands
- 2.0 86 km N of Cruz Bay, U.S. Virgin Islands
- 2.2 83 km NNE of Luquillo, Puerto Rico
- 2.4 93 km N of Culebra, Puerto Rico
- 2.6 79 km N of Charlotte Amalie, U.S. Virgin Islands
- 2.3 78 km N of Cruz Bay, U.S. Virgin Islands
- 2.2 89 km N of Charlotte Amalie, U.S. Virgin Islands
- 2.5 85 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.