QuakeIndex

Earthquake · reviewed by a seismologist

M 4.2ml

84 km NW of San Antonio, Puerto Rico

· 10 km deep · released about 30 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 82 kmRincón Municipio 87 kmAguada Municipio 87 kmIsabela Municipio 92 kmMoca Municipio 94 kmAñasco Municipio 99 kmQuebradillas Municipio 100 kmMayagüez Municipio 103 kmSan Sebastián Municipio 106 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 4.2 (ml)
Depth
10 km below the surface
Felt
52 reports · strongest reported intensity V
Nearest
Aguadilla Municipio, 82 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2353 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 52 people have reported feeling it to USGS.

How big was it?

This earthquake released about 30 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 5,600× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 250× the energy of this one
  3. Magna, Utah 2020 M 5.7 180× the energy of this one
  4. This earthquake M 4.2 about 30 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 63× 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 18.9900, -67.7010. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguadilla Municipio, PR 82 km (51 mi) NW of here earthquakes near Aguadilla Municipio
Rincón Municipio, PR 87 km (54 mi) NNW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 87 km (54 mi) NW of here earthquakes near Aguada Municipio
Isabela Municipio, PR 92 km (57 mi) NW of here earthquakes near Isabela Municipio
Moca Municipio, PR 94 km (59 mi) NW of here earthquakes near Moca Municipio
Añasco Municipio, PR 99 km (61 mi) NW of here earthquakes near Añasco Municipio

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. 3.3 76 km NE of Punta Cana, Dominican Republic
  2. 3.3 42 km NW of Aguadilla, Puerto Rico
  3. 2.9 94 km NE of Punta Cana, Dominican Republic
  4. 2.9 71 km NW of Rincón, Puerto Rico
  5. 3.0 76 km ENE of Punta Cana, Dominican Republic
  6. 2.5 86 km NW of San Antonio, Puerto Rico
  7. 3.8 71 km NNW of San Antonio, Puerto Rico
  8. 2.9 73 km NW of San Antonio, Puerto Rico
  9. 3.3 95 km NE of Punta Cana, Dominican Republic
  10. 3.5 82 km NE of Punta Cana, Dominican Republic
  11. 3.3 78 km ENE of Punta Cana, Dominican Republic
  12. 3.3 80 km NE of Punta Cana, Dominican Republic
  13. 2.6 83 km NW of San Antonio, Puerto Rico
  14. 2.8 90 km NE of Punta Cana, Dominican Republic
  15. 3.1 81 km NE of Punta Cana, Dominican Republic

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 500 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.