QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9md

123 km N of Suárez, Puerto Rico

· 107 km deep · released about 12 tons of TNT

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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 3.9 (md)
Depth
107 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 131 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1343 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 12 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 14,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 640× the energy of this one
  3. Magna, Utah 2020 M 5.7 450× the energy of this one
  4. This earthquake M 3.9 about 12 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 25× 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 19.5396, -65.7353. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 131 km (81 mi) NNE of here earthquakes near Dorado Municipio
Barceloneta Municipio, PR 147 km (91 mi) NE of here earthquakes near Barceloneta Municipio

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

Aftershocks so far

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

  1. 3.3 Puerto Rico region
  2. 3.7 Puerto Rico region
  3. 4.0 122 km N of Suárez, Puerto Rico
  4. 3.8 124 km N of Suárez, Puerto Rico
  5. 3.6 125 km N of Suárez, Puerto Rico
  6. 4.0 135 km N of Suárez, Puerto Rico
  7. 3.8 135 km N of Suárez, Puerto Rico
  8. 3.9 113 km N of Suárez, Puerto Rico
  9. 3.3 129 km NNE of San Juan, Puerto Rico
  10. 3.5 137 km N of Suárez, Puerto Rico
  11. 3.9 136 km N of Suárez, Puerto Rico
  12. 3.2 127 km N of Suárez, Puerto Rico
  13. 3.8 146 km N of Suárez, Puerto Rico
  14. 3.4 144 km N of Suárez, Puerto Rico
  15. 3.8 134 km N of Su?rez, 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 4.3 on 2022-12-25 — it released about 4.3 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.