QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

50 km NW of San Antonio, Puerto Rico

· 10 km deep · released about 700 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 49 kmAguada Municipio 57 kmIsabela Municipio 57 kmRincón Municipio 58 kmMoca Municipio 62 kmQuebradillas Municipio 65 kmAñasco Municipio 68 kmCamuy Municipio 72 kmSan Sebastián Municipio 73 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.9 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 49 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2412 days ago

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 700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 700 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 18.8406, -67.4061. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguadilla Municipio, PR 49 km (30 mi) NW of here earthquakes near Aguadilla Municipio
Aguada Municipio, PR 57 km (35 mi) NNW of here earthquakes near Aguada Municipio
Isabela Municipio, PR 57 km (36 mi) NW of here earthquakes near Isabela Municipio
Rincón Municipio, PR 58 km (36 mi) NNW of here earthquakes near Rincón Municipio
Moca Municipio, PR 62 km (38 mi) NNW of here earthquakes near Moca Municipio
Quebradillas Municipio, PR 65 km (41 mi) NW of here earthquakes near Quebradillas Municipio

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

Aftershocks so far

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

  1. 2.7 61 km N of San Antonio, Puerto Rico
  2. 2.8 52 km N of San Antonio, Puerto Rico
  3. 2.3 41 km NW of San Antonio, Puerto Rico
  4. 3.0 73 km N of San Antonio, Puerto Rico
  5. 3.1 82 km NW of San Antonio, Puerto Rico
  6. 3.1 70 km N of San Antonio, Puerto Rico
  7. 2.5 48 km NW of San Antonio, Puerto Rico
  8. 3.0 Mona Passage
  9. 3.3 61 km NNW of San Antonio, Puerto Rico
  10. 2.9 23 km NW of San Antonio, Puerto Rico
  11. 2.9 86 km ENE of Punta Cana, Dominican Republic
  12. 3.0 64 km NNW of San Antonio, Puerto Rico
  13. 3.0 89 km NE of Punta Cana, Dominican Republic
  14. 3.4 87 km NNW of San Antonio, Puerto Rico
  15. 3.1 62 km N of San Antonio, Puerto Rico

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . 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 6.0 on 2019-09-24 — it released about 43,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.