Earthquake near La Parguera, PR

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 27 km (17 mi) from the epicentre. In La Parguera, 8 km away, the estimate is intensity III (weak). 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.

Likely felt in: San Germán 17 km, intensity II · Yauco 18 km, intensity II · Pole Ojea 22 km, intensity II · Guayanilla 22 km, intensity II · Magas Arriba 24 km, intensity II · Puerto Real 26 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
3. Around the size people start to feel M 3.0 1.9× the energy of this one
4. This earthquake M 2.8 about 510 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.

For this area

The largest earthquake within 50 km since 2016 was M 6.4 on 2020-01-07 — about 230,000 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

1. 5.2 19 km SW of Stella, Puerto Rico · 49 km NW of this epicentre Dec 17, 2011
2. 5.1 21 km SW of Stella, Puerto Rico · 48 km WNW of this epicentre Dec 17, 2011

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 17.9387, -66.9840. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

1. 2.5 1 km SSW of Indios, Puerto Rico 09:56 UTC
2. 2.2 2 km WNW of Tallaboa, Puerto Rico 06:12 UTC
3. 2.4 6 km WSW of Fuig, Puerto Rico 05:56 UTC
4. 2.5 0 km NNW of Guayanilla, Puerto Rico 02:52 UTC
5. 2.4 3 km SE of Magas Arriba, Puerto Rico 00:08 UTC
6. 2.1 1 km ESE of Lajas, Puerto Rico 18:12 UTC
7. 2.5 3 km W of Ponce, Puerto Rico 15:55 UTC
8. 3.4 5 km W of Fuig, Puerto Rico 05:36 UTC
9. 2.3 1 km SSW of Indios, Puerto Rico 21:48 UTC
10. 2.5 3 km WSW of Guánica, Puerto Rico 20:41 UTC
11. 2.2 6 km S of La Parguera, Puerto Rico 18:48 UTC
12. 3.0 12 km NW of Puerto Real, Puerto Rico 18:46 UTC
13. 2.4 5 km W of Fuig, Puerto Rico 06:57 UTC
14. 2.4 2 km WNW of Yauco, Puerto Rico 06:11 UTC
15. 2.3 3 km SSW of Indios, Puerto Rico 22:51 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 19:27 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.