QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

123 km NNE of Suárez, Puerto Rico

· 109 km deep · released about 2.1 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 3.4 (md)
Depth
109 km below the surface
Felt
no reports yet
Nearest
Toa Baja Municipio, 133 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2789 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 2.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 80,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,500× the energy of this one
  4. This earthquake M 3.4 about 2.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.4× 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 19.5243, -65.6158. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Baja Municipio, PR 133 km (83 mi) NNE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 135 km (84 mi) NNE of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 145 km (90 mi) NE of here earthquakes near Vega Baja Municipio
Barceloneta Municipio, PR 153 km (95 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

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

  1. 3.4 116 km NNE of Suárez, Puerto Rico
  2. 2.8 109 km N of Suárez, Puerto Rico
  3. 2.2 101 km N of Suárez, Puerto Rico
  4. 2.5 112 km NNE of Suárez, Puerto Rico
  5. 2.7 115 km NNE of Vieques, Puerto Rico
  6. 3.4 156 km N of Charlotte Amalie, U.S. Virgin Islands
  7. 2.7 104 km NNE of Suárez, Puerto Rico
  8. 3.4 139 km N of San Juan, Puerto Rico
  9. 3.3 121 km NNE of Suárez, Puerto Rico
  10. 3.5 109 km NNE of Vieques, Puerto Rico
  11. 3.1 121 km N of San Juan, Puerto Rico
  12. 2.7 112 km N of Suárez, Puerto Rico
  13. 2.7 118 km N of Suárez, Puerto Rico
  14. 3.0 133 km NNW of Charlotte Amalie, U.S. Virgin Islands
  15. 3.1 134 km N of Charlotte Amalie, U.S. Virgin Islands

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 4.5 on 2018-03-06 — it released about 40 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.