149 km N of Suárez, Puerto Rico

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 62 km (39 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 5.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 30,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 1,300× the energy of this one
3. Magna, Utah 2020 M 5.7 930× the energy of this one
4. This earthquake M 3.7 about 5.7 tons of TNT
5. Around the size people start to feel M 3.0 this one released 12× 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 19.7681, -65.6286. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.4 145 km NNE of Vieques, Puerto Rico 21:37 UTC
2. 3.7 133 km NNE of Vieques, Puerto Rico 07:41 UTC
3. 3.4 146 km NNE of Vieques, Puerto Rico 16:09 UTC
4. 3.9 134 km NNE of Vieques, Puerto Rico 12:19 UTC
5. 4.0 120 km NNE of Vieques, Puerto Rico 06:04 UTC
6. 3.9 Puerto Rico region 01:09 UTC
7. 3.3 131 km NNE of Vieques, Puerto Rico 16:34 UTC
8. 3.5 132 km NNE of Vieques, Puerto Rico 12:27 UTC
9. 3.6 Puerto Rico region 11:17 UTC
10. 4.4 Puerto Rico region 10:59 UTC
11. 3.4 Puerto Rico region 23:18 UTC
12. 3.7 114 km N of Suárez, Puerto Rico 05:38 UTC
13. 3.2 Puerto Rico region 02:47 UTC
14. 3.6 135 km N of Suárez, Puerto Rico 23:09 UTC
15. 3.9 107 km NNE of San Juan, Puerto Rico 08:22 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 22:36 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.