138 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 9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 19,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 840× the energy of this one
3. Magna, Utah 2020 M 5.7 600× the energy of this one
4. This earthquake M 3.9 about 9 tons of TNT
5. Around the size people start to feel M 3.0 this one released 19× 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.

Where

Epicentre 19.5838, -64.7780. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.6 116 km N of Charlotte Amalie, U.S. Virgin Islands 18:22 UTC
2. 3.2 98 km N of Charlotte Amalie, U.S. Virgin Islands 18:12 UTC
3. 3.4 117 km N of Charlotte Amalie, U.S. Virgin Islands 17:47 UTC
4. 3.1 104 km N of Charlotte Amalie, U.S. Virgin Islands 17:18 UTC
5. 3.8 112 km N of Charlotte Amalie, U.S. Virgin Islands 17:02 UTC
6. 4.4 93 km N of Charlotte Amalie, U.S. Virgin Islands 16:57 UTC
7. 3.8 105 km N of Cruz Bay, U.S. Virgin Islands 22:40 UTC
8. 3.0 94 km N of Charlotte Amalie, U.S. Virgin Islands 22:40 UTC
9. 4.0 172 km N of Cruz Bay, U.S. Virgin Islands 00:57 UTC
10. 3.9 152 km N of Cruz Bay, U.S. Virgin Islands 03:55 UTC
11. 3.8 104 km N of Cruz Bay, U.S. Virgin Islands 02:18 UTC
12. 3.9 101 km N of Cruz Bay, U.S. Virgin Islands 07:19 UTC
13. 3.9 114 km N of Charlotte Amalie, U.S. Virgin Islands 13:59 UTC
14. 4.0 152 km N of Cruz Bay, U.S. Virgin Islands 23:51 UTC
15. 4.0 154 km NNE of Cruz Bay, U.S. Virgin Islands 06:40 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 15:37 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 2021-02-06 — it released about 51 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.