107 km N of Charlotte Amalie, U.S. Virgin Islands

Yes. A magnitude 4.0 earthquake was recorded 107 km N of Charlotte Amalie, U.S. Virgin Islands, at 6:34 pm AST on 30 March 2017 (22:34 UTC), 29 km deep. 1 person has reported feeling it to USGS.

2017-03-30 22:34 UTC · 29 km deep · released about 15 tons of TNT

Felt it? Tell USGS Check my area

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: 2017-03-30 22:34 UTC
Magnitude: M 4.0 (Md)
Depth: 29 km below the surface
Felt: 1 report · strongest reported intensity II
Nearest: Culebra Municipio, 112 km SSW
Status: Reviewed by a seismologist

USGS · last changed by USGS 3435 days ago · we first saw it 3435 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 92 km (57 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 15 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

Northridge, California 1994 M 6.7 11,000× the energy of this one
Mineral, Virginia 2011 M 5.8 500× the energy of this one
Magna, Utah 2020 M 5.7 350× the energy of this one
This earthquake M 4.0 about 15 tons of TNT
Around the size people start to feel M 3.0 this one released 32× more

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 2.8 times the energy of this one.

Before 2016, the USGS record lists 11 earthquakes of M5 or more within 50 km; the five largest:

6.1 91 km N of Charlotte Amalie, U.S. Virgin Islands · 29 km SE of this epicentre Oct 11, 2008
6.0 112 km N of Charlotte Amalie, U.S. Virgin Islands · 14 km ENE of this epicentre Oct 17, 2001
5.6 112 km N of Charlotte Amalie, U.S. Virgin Islands · 19 km ENE of this epicentre Oct 16, 2001
5.3 97 km N of Cruz Bay, U.S. Virgin Islands · 45 km ESE of this epicentre Dec 19, 2007
5.2 99 km N of Cruz Bay, U.S. Virgin Islands · 41 km ESE of this epicentre Dec 28, 2007

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

Map loads when it scrolls into view

Epicentre 19.3094, -65.0600. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction from the epicentre
Culebra Municipio, PR	112 km (70 mi)	SSW	earthquakes near Culebra Municipio
Fajardo Municipio, PR	117 km (73 mi)	SSW	earthquakes near Fajardo Municipio
Luquillo Municipio, PR	125 km (78 mi)	SSW	earthquakes near Luquillo Municipio
Río Grande Municipio, PR	130 km (81 mi)	SW	earthquakes near Río Grande Municipio
Ceiba Municipio, PR	131 km (82 mi)	SSW	earthquakes near Ceiba Municipio
Loíza Municipio, PR	134 km (83 mi)	SW	earthquakes near Loíza Municipio

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

Aftershocks so far

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

3.5 98 km N of Cruz Bay, U.S. Virgin Islands 06:33 UTC
2.0 96 km N of Cruz Bay, U.S. Virgin Islands 06:17 UTC
3.5 99 km N of Cruz Bay, U.S. Virgin Islands 06:06 UTC
2.8 97 km N of Cruz Bay, U.S. Virgin Islands 05:17 UTC
2.7 91 km N of Cruz Bay, U.S. Virgin Islands 05:15 UTC
2.7 97 km N of Cruz Bay, U.S. Virgin Islands 05:13 UTC
3.3 81 km N of Cruz Bay, U.S. Virgin Islands 04:43 UTC
2.7 95 km N of Cruz Bay, U.S. Virgin Islands 04:31 UTC
3.6 96 km N of Cruz Bay, U.S. Virgin Islands 04:26 UTC
3.6 98 km N of Cruz Bay, U.S. Virgin Islands 03:05 UTC
2.7 94 km N of Cruz Bay, U.S. Virgin Islands 02:26 UTC
2.3 95 km N of Cruz Bay, U.S. Virgin Islands 00:15 UTC
3.3 106 km N of Cruz Bay, U.S. Virgin Islands 00:12 UTC
3.3 101 km N of Cruz Bay, U.S. Virgin Islands 22:53 UTC
2.1 67 km N of Culebra, Puerto Rico 19:27 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 04:25 UTC. 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.