157 km N 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.

How big was it?

This earthquake released about 11 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 16,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 710× the energy of this one
3. Magna, Utah 2020 M 5.7 500× the energy of this one
4. This earthquake M 3.9 about 11 tons of TNT
5. Around the size people start to feel M 3.0 this one released 22× 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 19.7386, -64.5833. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.9 131 km N of Cruz Bay, U.S. Virgin Islands 18:00 UTC
2. 3.8 135 km N of Cruz Bay, U.S. Virgin Islands 16:44 UTC
3. 3.9 153 km N of Cruz Bay, U.S. Virgin Islands 08:56 UTC
4. 3.6 140 km N of Charlotte Amalie, U.S. Virgin Islands 20:02 UTC
5. 3.9 Virgin Islands 01:47 UTC
6. 3.8 163 km NNE of Cruz Bay, U.S. Virgin Islands 01:59 UTC
7. 3.8 136 km N of Charlotte Amalie, U.S. Virgin Islands 18:59 UTC
8. 3.6 151 km N of Cruz Bay, U.S. Virgin Islands 18:53 UTC
9. 3.7 142 km N of Charlotte Amalie, U.S. Virgin Islands 21:43 UTC
10. 3.4 145 km NNE of Cruz Bay, U.S. Virgin Islands 06:39 UTC
11. 3.9 Virgin Islands 14:00 UTC
12. 3.8 166 km NNE of Cruz Bay, U.S. Virgin Islands 03:00 UTC
13. 3.7 136 km N of Cruz Bay, U.S. Virgin Islands 08:33 UTC
14. 3.8 168 km NNE of Cruz Bay, U.S. Virgin Islands 07:39 UTC
15. 4.0 Virgin Islands 06:56 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 13:29 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 39 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.