QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

103 km N of Suárez, Puerto Rico

· 34 km deep · released about 4.1 tons of TNT

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10 km30 km60 km120 km N Loíza Municipio 104 kmFajardo Municipio 109 kmRío Grande Municipio 110 kmCarolina Municipio 110 kmLuquillo Municipio 110 kmSan Juan Municipio 110 kmCataño Municipio 111 kmToa Baja Municipio 112 kmDorado Municipio 114 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 3.6 (md)
Depth
34 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 104 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1364 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 4.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 42,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,300× the energy of this one
  4. This earthquake M 3.6 about 4.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.5× 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 19.3601, -65.7256. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 104 km (65 mi) NNE of here earthquakes near Loíza Municipio
Fajardo Municipio, PR 109 km (68 mi) N of here earthquakes near Fajardo Municipio
Río Grande Municipio, PR 110 km (68 mi) N of here earthquakes near Río Grande Municipio
Carolina Municipio, PR 110 km (68 mi) NNE of here earthquakes near Carolina Municipio
Luquillo Municipio, PR 110 km (69 mi) N of here earthquakes near Luquillo Municipio
San Juan Municipio, PR 110 km (69 mi) NNE of here earthquakes near San Juan 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. 3.7 139 km N of Suárez, Puerto Rico
  2. 4.1 139 km N of Suárez, Puerto Rico
  3. 4.1 132 km N of Suárez, Puerto Rico
  4. 4.0 109 km N of Suárez, Puerto Rico
  5. 3.1 Puerto Rico region
  6. 4.0 Puerto Rico region
  7. 4.1 141 km N of Suárez, Puerto Rico
  8. 4.0 128 km N of Suárez, Puerto Rico
  9. 3.9 124 km N of Suárez, Puerto Rico
  10. 3.6 118 km N of Suárez, Puerto Rico
  11. 3.4 132 km N of Suárez, Puerto Rico
  12. 3.4 79 km NNE of Vieques, Puerto Rico
  13. 3.2 63 km NNE of San Juan, Puerto Rico
  14. 3.7 113 km N of Suárez, Puerto Rico
  15. 3.4 Puerto Rico region

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 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.