155 km NNE of Cruz Bay, U.S. Virgin Islands

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 310,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 14,000× the energy of this one
3. Magna, Utah 2020 M 5.7 9,800× the energy of this one
4. This earthquake M 3.0 about 1,100 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

Epicentre 19.7095, -64.4923. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 4.0 123 km NNE of Cruz Bay, U.S. Virgin Islands 01:51 UTC
2. 3.7 147 km NNE of Cruz Bay, U.S. Virgin Islands 01:26 UTC
3. 4.1 142 km NNE of Cruz Bay, U.S. Virgin Islands 18:50 UTC
4. 3.6 116 km N of Cruz Bay, U.S. Virgin Islands 12:41 UTC
5. 4.1 148 km NNE of Cruz Bay, U.S. Virgin Islands 12:44 UTC
6. 3.9 137 km N of Charlotte Amalie, U.S. Virgin Islands 13:00 UTC
7. 4.2 125 km N of Charlotte Amalie, U.S. Virgin Islands 12:52 UTC
8. 3.7 163 km NNE of Cruz Bay, U.S. Virgin Islands 15:06 UTC
9. 3.8 114 km NNE of Cruz Bay, U.S. Virgin Islands 01:56 UTC
10. 4.0 126 km NNE of Cruz Bay, U.S. Virgin Islands 05:57 UTC
11. 3.9 123 km NNE of Cruz Bay, U.S. Virgin Islands 04:56 UTC
12. 3.9 112 km NNE of Cruz Bay, U.S. Virgin Islands 23:49 UTC
13. 4.0 120 km N of Cruz Bay, U.S. Virgin Islands 06:47 UTC
14. 3.5 125 km N of Charlotte Amalie, U.S. Virgin Islands 21:10 UTC
15. 3.7 128 km N of Cruz Bay, U.S. Virgin Islands 19:54 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 12:43 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 5.0 on 2019-10-06 — it released about 760 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

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.