QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

109 km N of Suárez, Puerto Rico

· 43 km deep · released about 460 lb of TNT

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10 km30 km60 km120 km N Loíza Municipio 110 kmFajardo Municipio 113 kmRío Grande Municipio 114 kmLuquillo Municipio 114 kmCarolina Municipio 116 kmSan Juan Municipio 117 kmCataño Municipio 118 kmToa Baja Municipio 119 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 2.8 (md)
Depth
43 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 110 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2679 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 460 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 33,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 23,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 460 lb of TNT

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 19.3963, -65.6566. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 110 km (68 mi) NNE of here earthquakes near Loíza Municipio
Fajardo Municipio, PR 113 km (70 mi) N of here earthquakes near Fajardo Municipio
Río Grande Municipio, PR 114 km (71 mi) N of here earthquakes near Río Grande Municipio
Luquillo Municipio, PR 114 km (71 mi) N of here earthquakes near Luquillo Municipio
Carolina Municipio, PR 116 km (72 mi) NNE of here earthquakes near Carolina Municipio
San Juan Municipio, PR 117 km (72 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

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

  1. 2.5 138 km NNE of Suárez, Puerto Rico
  2. 3.3 126 km NNE of Vieques, Puerto Rico
  3. 3.2 104 km NNE of Suárez, Puerto Rico
  4. 3.1 113 km N of Suárez, Puerto Rico
  5. 3.0 148 km NNE of Vieques, Puerto Rico
  6. 2.1 82 km NNE of Suárez, Puerto Rico
  7. 3.2 135 km NNE of Vieques, Puerto Rico
  8. 1.9 80 km NNE of Vieques, Puerto Rico
  9. 2.7 123 km NNE of Suárez, Puerto Rico
  10. 3.1 144 km NNE of Vieques, Puerto Rico
  11. 3.4 138 km NNE of Vieques, Puerto Rico
  12. 3.7 133 km NNE of Vieques, Puerto Rico
  13. 3.5 118 km NNE of Vieques, Puerto Rico
  14. 3.5 Puerto Rico region
  15. 3.0 78 km NNE of Vieques, 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 4.5 on 2018-03-06 — it released about 370 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.