128 km N of Suárez, 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 14 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 12,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 560× the energy of this one
3. Magna, Utah 2020 M 5.7 390× the energy of this one
4. This earthquake M 4.0 about 14 tons of TNT
5. Around the size people start to feel M 3.0 this one released 29× 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 19.5873, -65.7476. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.8 142 km N of Suárez, Puerto Rico 23:00 UTC
2. 3.8 Puerto Rico region 19:34 UTC
3. 4.0 132 km N of Suárez, Puerto Rico 18:15 UTC
4. 3.9 135 km N of Suárez, Puerto Rico 18:03 UTC
5. 3.5 90 km N of Suárez, Puerto Rico 16:07 UTC
6. 3.7 129 km N of Suárez, Puerto Rico 22:48 UTC
7. 3.8 122 km N of Suárez, Puerto Rico 10:53 UTC
8. 3.5 122 km N of Suárez, Puerto Rico 11:14 UTC
9. 3.9 110 km N of Suárez, Puerto Rico 07:55 UTC
10. 3.8 149 km N of Suárez, Puerto Rico 07:50 UTC
11. 3.7 135 km N of Suárez, Puerto Rico 12:59 UTC
12. 3.4 106 km NNE of Suárez, Puerto Rico 13:45 UTC
13. 3.7 149 km N of Suárez, Puerto Rico 01:27 UTC
14. 3.8 135 km N of Suárez, Puerto Rico 23:06 UTC
15. 3.8 135 km N of Suárez, Puerto Rico 05:38 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 10:28 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 4.4 on 2023-02-28 — it released about 5.1 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.