160 km NNE of Vieques, Puerto Rico

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 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
3. Around the size people start to feel M 3.0 4× the energy of this one
4. This earthquake M 2.6 about 240 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 19.7595, -65.2480. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.4 117 km N of Charlotte Amalie, U.S. Virgin Islands 22:58 UTC
2. 3.5 133 km N of Charlotte Amalie, U.S. Virgin Islands 01:24 UTC
3. 2.8 130 km NNW of Charlotte Amalie, U.S. Virgin Islands 03:26 UTC
4. 3.4 Puerto Rico region 08:21 UTC
5. 3.4 122 km N of Charlotte Amalie, U.S. Virgin Islands 02:50 UTC
6. 3.3 123 km N of Charlotte Amalie, U.S. Virgin Islands 15:39 UTC
7. 2.8 117 km N of Charlotte Amalie, U.S. Virgin Islands 14:08 UTC
8. 3.5 134 km N of Charlotte Amalie, U.S. Virgin Islands 07:19 UTC
9. 3.4 130 km N of Charlotte Amalie, U.S. Virgin Islands 05:38 UTC
10. 3.4 138 km NNW of Charlotte Amalie, U.S. Virgin Islands 08:01 UTC
11. 3.4 122 km N of Charlotte Amalie, U.S. Virgin Islands 03:34 UTC
12. 3.2 125 km N of Charlotte Amalie, U.S. Virgin Islands 02:55 UTC
13. 3.4 120 km N of Charlotte Amalie, U.S. Virgin Islands 14:16 UTC
14. 3.4 148 km N of Charlotte Amalie, U.S. Virgin Islands 03:46 UTC
15. 3.0 124 km N of Charlotte Amalie, U.S. Virgin Islands 23:08 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 23:44 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.