QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8md

122 km N of Suárez, Puerto Rico

· 96 km deep · released about 7.8 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 3.8 (md)
Depth
96 km below the surface
Felt
no reports yet
Nearest
Toa Baja Municipio, 128 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1193 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 7.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 970× the energy of this one
  3. Magna, Utah 2020 M 5.7 680× the energy of this one
  4. This earthquake M 3.8 about 7.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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 19.5331, -65.7678. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Baja Municipio, PR 128 km (79 mi) NNE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 129 km (80 mi) NNE of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 137 km (85 mi) NNE of here earthquakes near Vega Baja Municipio
Barceloneta Municipio, PR 144 km (90 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 95 km NNE of Suárez, Puerto Rico
  2. 3.8 115 km N of San Juan, Puerto Rico
  3. 3.7 120 km N of San Juan, Puerto Rico
  4. 3.8 127 km N of San Juan, Puerto Rico
  5. 3.4 104 km N of San Juan, Puerto Rico
  6. 3.9 144 km N of San Juan, Puerto Rico
  7. 3.4 125 km N of San Juan, Puerto Rico
  8. 3.8 142 km NNE of Vieques, Puerto Rico
  9. 3.6 121 km N of Suárez, Puerto Rico
  10. 4.0 155 km NNE of Vieques, Puerto Rico
  11. 3.5 81 km NNE of Vieques, Puerto Rico
  12. 3.6 136 km N of Suárez, Puerto Rico
  13. 3.4 122 km NNE of Vieques, Puerto Rico
  14. 3.7 126 km NNE of Vieques, Puerto Rico
  15. 3.5 80 km NNE of Vieques, 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 4.4 on 2023-02-28 — it released about 8.8 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.