QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0md

94 km N of Culebra, Puerto Rico

· 8.0 km deep · released about 16 tons of TNT

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10 km30 km60 km120 km N Fajardo Municipio 91 kmCulebra Municipio 92 kmLuquillo Municipio 98 kmRío Grande Municipio 102 kmLoíza Municipio 104 kmCeiba Municipio 106 kmCarolina Municipio 110 kmCanóvanas Municipio 111 kmNaguabo Municipio 115 km
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
8.0 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Fajardo Municipio, 91 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 27 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 2 people have reported feeling it to USGS.

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.

Where

Epicentre 19.1566, -65.2976. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 91 km (57 mi) NNE of here earthquakes near Fajardo Municipio
Culebra Municipio, PR 92 km (57 mi) N of here earthquakes near Culebra Municipio
Luquillo Municipio, PR 98 km (61 mi) NNE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 102 km (63 mi) NNE of here earthquakes near Río Grande Municipio
Loíza Municipio, PR 104 km (65 mi) NE of here earthquakes near Loíza Municipio
Ceiba Municipio, PR 106 km (66 mi) NNE of here earthquakes near Ceiba Municipio

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

Aftershocks so far

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

  1. 3.3 73 km NNW of Charlotte Amalie, U.S. Virgin Islands
  2. 3.4 110 km N of Suárez, Puerto Rico
  3. 3.2 72 km NNE of Vieques, Puerto Rico
  4. 2.9 76 km NNW of Charlotte Amalie, U.S. Virgin Islands
  5. 2.8 70 km NNE of Vieques, Puerto Rico
  6. 3.2 66 km N of Culebra, Puerto Rico
  7. 3.0 75 km NNW of Charlotte Amalie, U.S. Virgin Islands
  8. 3.3 58 km NNE of Culebra, Puerto Rico
  9. 3.2 61 km NNW of Charlotte Amalie, U.S. Virgin Islands
  10. 3.1 65 km NNW of Charlotte Amalie, U.S. Virgin Islands
  11. 3.1 63 km NNW of Charlotte Amalie, U.S. Virgin Islands
  12. 3.3 70 km N of Culebra, Puerto Rico
  13. 3.4 68 km N of Culebra, Puerto Rico
  14. 3.3 73 km N of Culebra, Puerto Rico
  15. 3.3 69 km N of Culebra, 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 4.9 on 2024-04-28 — it released about 21 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.