145 km NNW 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 250,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
4. This earthquake M 3.1 about 1,300 lb of TNT
5. Around the size people start to feel M 3.0 this one released 1.4× 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 19.6235, -65.2471. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.8 130 km NNW of Charlotte Amalie, U.S. Virgin Islands 03:26 UTC
2. 3.4 Puerto Rico region 08:21 UTC
3. 3.3 105 km N of Charlotte Amalie, U.S. Virgin Islands 03:34 UTC
4. 3.2 96 km NNW of Charlotte Amalie, U.S. Virgin Islands 02:57 UTC
5. 3.1 104 km N of Charlotte Amalie, U.S. Virgin Islands 02:53 UTC
6. 3.4 122 km N of Charlotte Amalie, U.S. Virgin Islands 02:50 UTC
7. 3.3 123 km N of Charlotte Amalie, U.S. Virgin Islands 15:39 UTC
8. 2.8 117 km N of Charlotte Amalie, U.S. Virgin Islands 14:08 UTC
9. 3.1 98 km NNE of Vieques, Puerto Rico 10:59 UTC
10. 3.5 134 km N of Charlotte Amalie, U.S. Virgin Islands 07:19 UTC
11. 3.4 130 km N of Charlotte Amalie, U.S. Virgin Islands 05:38 UTC
12. 3.6 135 km N of Charlotte Amalie, U.S. Virgin Islands 04:28 UTC
13. 3.4 138 km NNW of Charlotte Amalie, U.S. Virgin Islands 08:01 UTC
14. 3.4 102 km N of Culebra, Puerto Rico 03:55 UTC
15. 3.4 122 km N of Charlotte Amalie, U.S. Virgin Islands 03:34 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 15:27 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.