QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0md

109 km N of Suárez, Puerto Rico

· 77 km deep · released about 14 tons of TNT

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10 km30 km60 km120 km N Loíza Municipio 109 kmSan Juan Municipio 115 kmCataño Municipio 115 kmCarolina Municipio 115 kmToa Baja Municipio 115 kmRío Grande Municipio 116 kmFajardo Municipio 116 kmDorado Municipio 116 kmLuquillo Municipio 117 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
77 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Loíza Municipio, 109 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1156 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 14 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 12,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 560× the energy of this one
  3. Magna, Utah 2020 M 5.7 390× the energy of this one
  4. This earthquake M 4.0 about 14 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 29× 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 19.4156, -65.7795. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 109 km (68 mi) N of here earthquakes near Loíza Municipio
San Juan Municipio, PR 115 km (71 mi) NNE of here earthquakes near San Juan Municipio
Cataño Municipio, PR 115 km (71 mi) NNE of here earthquakes near Cataño Municipio
Carolina Municipio, PR 115 km (71 mi) N of here earthquakes near Carolina Municipio
Toa Baja Municipio, PR 115 km (72 mi) NNE of here earthquakes near Toa Baja Municipio
Río Grande Municipio, PR 116 km (72 mi) N of here earthquakes near Río Grande Municipio

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

Aftershocks so far

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

  1. 3.8 142 km N of Suárez, Puerto Rico
  2. 3.8 Puerto Rico region
  3. 4.0 132 km N of Suárez, Puerto Rico
  4. 3.9 135 km N of Suárez, Puerto Rico
  5. 3.5 90 km N of Suárez, Puerto Rico
  6. 3.7 129 km N of Suárez, Puerto Rico
  7. 3.8 122 km N of Suárez, Puerto Rico
  8. 3.5 122 km N of Suárez, Puerto Rico
  9. 3.9 110 km N of Suárez, Puerto Rico
  10. 3.8 149 km N of Suárez, Puerto Rico
  11. 3.7 135 km N of Suárez, Puerto Rico
  12. 3.4 106 km NNE of Suárez, Puerto Rico
  13. 3.7 149 km N of Suárez, Puerto Rico
  14. 3.8 135 km N of Suárez, Puerto Rico
  15. 3.8 135 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2023-02-28 — it released about 5.1 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.