QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0md

124 km N of Su?rez, Puerto Rico

Yes. A magnitude 4.0 earthquake was recorded 124 km N of Su?rez, Puerto Rico, at 1:49 am AST on 7 November 2022 (05:49 UTC), 29 km deep.

· 29 km deep · released about 16 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 4.0 (md)
Depth
29 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 130 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1028 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 94 km (58 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 16 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 10,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 470× the energy of this one
  3. Magna, Utah 2020 M 5.7 330× the energy of this one
  4. This earthquake M 4.0 about 16 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 34× 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.

For this area

The largest earthquake within 50 km (31 mi) since our catalogue begins in 2016. The previous largest was M 4.0 on 2019-06-21.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.1 92 km N of Suárez, Puerto Rico · 33 km SSE of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 19.5515, -65.7890. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Dorado Municipio, PR 130 km (81 mi) SSW earthquakes near Dorado 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. 3.6 137 km NNE of Vieques, Puerto Rico
  2. 3.4 Puerto Rico region
  3. 3.4 120 km NNE of Vieques, Puerto Rico
  4. 3.4 145 km NNE of Vieques, Puerto Rico
  5. 3.7 133 km NNE of Vieques, Puerto Rico
  6. 3.4 146 km NNE of Vieques, Puerto Rico
  7. 3.9 134 km NNE of Vieques, Puerto Rico
  8. 4.0 120 km NNE of Vieques, Puerto Rico
  9. 3.9 Puerto Rico region
  10. 3.3 131 km NNE of Vieques, Puerto Rico
  11. 3.5 132 km NNE of Vieques, Puerto Rico
  12. 3.6 Puerto Rico region
  13. 4.4 Puerto Rico region
  14. 3.4 Puerto Rico region
  15. 3.7 114 km N of Suárez, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.