135 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 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
3. Around the size people start to feel M 3.0 4× the energy of this one
4. This earthquake M 2.6 about 240 lb of TNT

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 19.6142, -67.6243. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.0 100 km NE of Punta Cana, Dominican Republic 03:44 UTC
2. 3.2 150 km NNW of San Antonio, Puerto Rico 10:05 UTC
3. 3.2 102 km NNE of Punta Cana, Dominican Republic 15:51 UTC
4. 3.2 102 km NW of San Antonio, Puerto Rico 09:28 UTC
5. 3.8 122 km NNW of San Antonio, Puerto Rico 23:46 UTC
6. 3.8 117 km NE of Punta Cana, Dominican Republic 00:42 UTC
7. 3.1 99 km NE of Punta Cana, Dominican Republic 03:06 UTC
8. 3.4 104 km NE of Punta Cana, Dominican Republic 01:16 UTC
9. 2.7 102 km NNW of San Antonio, Puerto Rico 19:04 UTC
10. 3.4 117 km NE of Punta Cana, Dominican Republic 05:44 UTC
11. 3.5 Mona Passage 02:40 UTC
12. 2.6 135 km NNW of San Antonio, Puerto Rico 23:36 UTC
13. 3.6 105 km NNW of San Antonio, Puerto Rico 21:13 UTC
14. 3.5 96 km NNE of Punta Cana, Dominican Republic 08:46 UTC
15. 3.7 95 km NE of Punta Cana, Dominican Republic 08:58 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 14:09 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 4.7 on 2018-12-07 — it released about 1,300 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.