QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

133 km NNE of Vieques, Puerto Rico

· 72 km deep · released about 1,500 lb 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 3.1 (md)
Depth
72 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 137 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2543 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 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,200× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× 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 19.5175, -65.2963. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 137 km (85 mi) NNE of here earthquakes near Loíza Municipio
Cataño Municipio, PR 149 km (93 mi) NE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 151 km (94 mi) NE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 154 km (96 mi) NE of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 165 km (103 mi) NE of here earthquakes near Vega Baja Municipio

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

Aftershocks so far

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

  1. 3.3 121 km N of Suárez, Puerto Rico
  2. 2.9 104 km NNE of Vieques, Puerto Rico
  3. 2.9 99 km NNE of Vieques, Puerto Rico
  4. 3.3 Puerto Rico region
  5. 3.9 125 km N of Charlotte Amalie, U.S. Virgin Islands
  6. 3.0 151 km NNE of Vieques, Puerto Rico
  7. 3.3 119 km N of Charlotte Amalie, U.S. Virgin Islands
  8. 3.2 124 km N of Charlotte Amalie, U.S. Virgin Islands
  9. 2.7 Puerto Rico region
  10. 3.0 120 km NNE of Vieques, Puerto Rico
  11. 2.9 86 km NNW of Charlotte Amalie, U.S. Virgin Islands
  12. 2.7 87 km N of Culebra, Puerto Rico
  13. 3.0 88 km NNW of Charlotte Amalie, U.S. Virgin Islands
  14. 3.4 111 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 2.6 123 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 4.9 on 2018-11-14 — it released about 450 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.