75 km E of Cruz Bay, U.S. Virgin Islands

2016-10-15 12:29 UTC · 97 km deep · released about 240 lb of TNT

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: 2016-10-15 12:29 UTC
Magnitude: M 2.6 (Md)
Depth: 97 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 3543 days ago · we first saw it 3543 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
Magna, Utah 2020 M 5.7 45,000× the energy of this one
Around the size people start to feel M 3.0 4× the energy of this one
This earthquake M 2.6 about 240 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.

Where

Map loads when it scrolls into view

Epicentre 18.3379, -64.0777. Map © OpenStreetMap contributors.

Aftershocks so far

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

1.9 71 km ENE of Cruz Bay, U.S. Virgin Islands 18:40 UTC
2.5 66 km E of Cruz Bay, U.S. Virgin Islands 12:00 UTC
2.0 48 km ENE of Cruz Bay, U.S. Virgin Islands 08:45 UTC
1.8 48 km ENE of Cruz Bay, U.S. Virgin Islands 10:46 UTC
2.7 55 km NE of Cruz Bay, U.S. Virgin Islands 05:08 UTC
2.1 80 km ENE of Cruz Bay, U.S. Virgin Islands 02:08 UTC
2.3 68 km ENE of Cruz Bay, U.S. Virgin Islands 12:29 UTC
2.3 46 km ENE of Cruz Bay, U.S. Virgin Islands 11:12 UTC
2.3 39 km ENE of Cruz Bay, U.S. Virgin Islands 03:00 UTC
2.3 74 km ENE of Cruz Bay, U.S. Virgin Islands 14:49 UTC
2.4 79 km ENE of Cruz Bay, U.S. Virgin Islands 15:00 UTC
2.5 76 km NE of Cruz Bay, U.S. Virgin Islands 19:33 UTC
2.9 69 km ENE of Cruz Bay, U.S. Virgin Islands 02:09 UTC
2.5 58 km E of Cruz Bay, U.S. Virgin Islands 02:31 UTC
2.5 49 km E of Cruz Bay, U.S. Virgin Islands 15:51 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 23:39 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.