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

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 490 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 31,000× the energy of this one
2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
3. Around the size people start to feel M 3.0 1.9× the energy of this one
4. This earthquake M 2.8 about 490 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 19.8150, -65.0856. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.0 160 km N of Cruz Bay, U.S. Virgin Islands 19:48 UTC
2. 3.4 134 km N of Cruz Bay, U.S. Virgin Islands 16:10 UTC
3. 3.7 154 km N of Cruz Bay, U.S. Virgin Islands 03:28 UTC
4. 3.2 130 km NNE of Vieques, Puerto Rico 00:00 UTC
5. 3.0 119 km N of Charlotte Amalie, U.S. Virgin Islands 20:08 UTC
6. 3.3 156 km N of Cruz Bay, U.S. Virgin Islands 03:47 UTC
7. 3.1 138 km N of Charlotte Amalie, U.S. Virgin Islands 14:38 UTC
8. 3.1 133 km NNE of Vieques, Puerto Rico 13:36 UTC
9. 3.2 137 km NNE of Vieques, Puerto Rico 02:56 UTC
10. 2.8 126 km NNW of Charlotte Amalie, U.S. Virgin Islands 23:28 UTC
11. 3.3 126 km NNE of Vieques, Puerto Rico 06:37 UTC
12. 3.0 148 km NNE of Vieques, Puerto Rico 03:26 UTC
13. 3.2 135 km NNE of Vieques, Puerto Rico 10:11 UTC
14. 3.1 144 km NNE of Vieques, Puerto Rico 23:33 UTC
15. 3.4 138 km NNE of Vieques, Puerto Rico 09:39 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 13:28 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 4.9 on 2018-11-14 — it released about 1,400 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.