143 km NNE of Vieques, Puerto Rico

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

How big was it?

This earthquake released about 18 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 9,400× the energy of this one
2. Mineral, Virginia 2011 M 5.8 420× the energy of this one
3. Magna, Utah 2020 M 5.7 300× the energy of this one
4. This earthquake M 4.0 about 18 tons of TNT
5. Around the size people start to feel M 3.0 this one released 38× 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 19.6356, -65.3470. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.4 126 km NNE of Vieques, Puerto Rico 00:07 UTC
2. 2.6 103 km NNE of Suárez, Puerto Rico 08:44 UTC
3. 3.6 121 km NNE of Suárez, Puerto Rico 08:11 UTC
4. 3.3 133 km NNE of Vieques, Puerto Rico 16:41 UTC
5. 3.4 133 km NNE of Vieques, Puerto Rico 20:43 UTC
6. 3.7 132 km NNE of Vieques, Puerto Rico 05:37 UTC
7. 3.8 107 km N of Suárez, Puerto Rico 01:52 UTC
8. 3.4 122 km N of Charlotte Amalie, U.S. Virgin Islands 08:49 UTC
9. 3.4 102 km NNW of Charlotte Amalie, U.S. Virgin Islands 13:07 UTC
10. 3.6 126 km N of Charlotte Amalie, U.S. Virgin Islands 15:07 UTC
11. 3.8 104 km NNW of Charlotte Amalie, U.S. Virgin Islands 06:09 UTC
12. 3.6 116 km NNW of Charlotte Amalie, U.S. Virgin Islands 16:15 UTC
13. 3.7 122 km N of Culebra, Puerto Rico 07:05 UTC
14. 3.3 146 km N of Charlotte Amalie, U.S. Virgin Islands 17:21 UTC
15. 3.4 133 km NNE of Vieques, Puerto Rico 08:58 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 14:32 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 19 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.