Puerto Rico region

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 69 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.4 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 2,500× the energy of this one
2. Mineral, Virginia 2011 M 5.8 110× the energy of this one
3. Magna, Utah 2020 M 5.7 78× the energy of this one
4. This earthquake M 4.4 about 69 tons of TNT
5. Around the size people start to feel M 3.0 this one released 140× 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 19.5660, -65.3656. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.4 Puerto Rico region 12:48 UTC
2. 3.9 Puerto Rico region 07:31 UTC
3. 3.9 Puerto Rico region 08:45 UTC
4. 3.8 143 km N of Suárez, Puerto Rico 05:43 UTC
5. 4.0 133 km N of Suárez, Puerto Rico 02:33 UTC
6. 4.0 138 km N of Suárez, Puerto Rico 09:05 UTC
7. 3.7 135 km N of Suárez, Puerto Rico 18:14 UTC
8. 3.4 134 km N of Suárez, Puerto Rico 22:31 UTC
9. 3.7 141 km NNE of Vieques, Puerto Rico 21:00 UTC
10. 3.3 Puerto Rico region 11:19 UTC
11. 3.7 Puerto Rico region 06:28 UTC
12. 4.0 122 km N of Suárez, Puerto Rico 06:22 UTC
13. 3.8 124 km N of Suárez, Puerto Rico 05:53 UTC
14. 3.6 125 km N of Suárez, Puerto Rico 05:33 UTC
15. 4.0 135 km N of Suárez, Puerto Rico 03:18 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 15:56 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 4.9 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.