QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

48 km NW of San Antonio, Puerto Rico

· 5.9 km deep · released about 1,100 lb of TNT

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10 km30 km60 km120 km N Aguadilla Municipio 47 kmAguada Municipio 55 kmIsabela Municipio 56 kmRincón Municipio 57 kmMoca Municipio 60 kmQuebradillas Municipio 64 kmAñasco Municipio 67 kmCamuy Municipio 70 kmSan Sebastián Municipio 71 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 3.0 (md)
Depth
5.9 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 47 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 924 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 1,100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 300,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,400× the energy of this one
  4. This earthquake M 3.0 about 1,100 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 18.8333, -67.3907. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguadilla Municipio, PR 47 km (29 mi) NNW of here earthquakes near Aguadilla Municipio
Aguada Municipio, PR 55 km (34 mi) NNW of here earthquakes near Aguada Municipio
Isabela Municipio, PR 56 km (35 mi) NW of here earthquakes near Isabela Municipio
Rincón Municipio, PR 57 km (35 mi) NNW of here earthquakes near Rincón Municipio
Moca Municipio, PR 60 km (38 mi) NNW of here earthquakes near Moca Municipio
Quebradillas Municipio, PR 64 km (40 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

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

  1. 3.2 69 km NW of San Antonio, Puerto Rico
  2. 2.9 36 km NNW of San Antonio, Puerto Rico
  3. 3.4 48 km N of Isabela, Puerto Rico
  4. 3.4 8 km WNW of San Antonio, Puerto Rico
  5. 3.2 80 km NW of San Antonio, Puerto Rico
  6. 3.2 50 km N of Isabela, Puerto Rico
  7. 3.4 16 km NW of Rincón, Puerto Rico
  8. 3.4 45 km N of Isabela, Puerto Rico
  9. 3.0 38 km NW of San Antonio, Puerto Rico
  10. 2.6 25 km NNE of Isabela, Puerto Rico
  11. 3.0 27 km NW of San Antonio, Puerto Rico
  12. 2.8 24 km WNW of Rincón, Puerto Rico
  13. 2.9 22 km NW of San Antonio, Puerto Rico
  14. 3.3 72 km NW of Rincón, Puerto Rico
  15. 3.1 77 km NW 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 27,000 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.