149 km NNW of San Antonio, 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 2.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 80,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 3,600× the energy of this one
3. Magna, Utah 2020 M 5.7 2,500× the energy of this one
4. This earthquake M 3.4 about 2.1 tons of TNT
5. Around the size people start to feel M 3.0 this one released 4.4× 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 19.7365, -67.6541. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.6 121 km NNW of San Antonio, Puerto Rico 06:26 UTC
2. 3.0 110 km NE of Punta Cana, Dominican Republic 17:38 UTC
3. 3.4 117 km NNE of Punta Cana, Dominican Republic 13:50 UTC
4. 3.0 112 km NNE of Punta Cana, Dominican Republic 11:00 UTC
5. 3.1 116 km NNE of Punta Cana, Dominican Republic 04:08 UTC
6. 3.0 101 km NNE of Punta Cana, Dominican Republic 01:43 UTC
7. 2.1 106 km NNW of San Antonio, Puerto Rico 09:02 UTC
8. 3.4 110 km NNE of Punta Cana, Dominican Republic 04:39 UTC
9. 2.7 140 km NNE of Punta Cana, Dominican Republic 17:30 UTC
10. 3.3 136 km NNE of Punta Cana, Dominican Republic 03:08 UTC
11. 3.1 117 km NE of Punta Cana, Dominican Republic 20:16 UTC
12. 3.0 106 km NE of Punta Cana, Dominican Republic 06:35 UTC
13. 2.7 108 km NNW of San Antonio, Puerto Rico 09:40 UTC
14. 3.2 119 km NNW of San Antonio, Puerto Rico 20:33 UTC
15. 3.4 108 km NNE of Punta Cana, Dominican Republic 08:26 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 15:20 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.