QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7Md

63 km N of Loíza, Puerto Rico

· 28 km deep · released about 340 lb of TNT

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10 km30 km60 km120 km N Loíza Municipio 63 kmSan Juan Municipio 69 kmCarolina Municipio 69 kmCataño Municipio 69 kmToa Baja Municipio 70 kmRío Grande Municipio 71 kmDorado Municipio 73 kmLuquillo Municipio 73 kmFajardo Municipio 75 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 2.7 (Md)
Depth
28 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 63 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3590 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 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 19.0076, -65.8625. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 63 km (39 mi) N of here earthquakes near Loíza Municipio
San Juan Municipio, PR 69 km (43 mi) NNE of here earthquakes near San Juan Municipio
Carolina Municipio, PR 69 km (43 mi) N of here earthquakes near Carolina Municipio
Cataño Municipio, PR 69 km (43 mi) NNE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 70 km (44 mi) NNE of here earthquakes near Toa Baja Municipio
Río Grande Municipio, PR 71 km (44 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

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

  1. 2.9 72 km N of San Juan, Puerto Rico
  2. 2.8 86 km NNE of San Juan, Puerto Rico
  3. 3.1 89 km NNE of Vieques, Puerto Rico
  4. 2.5 25 km N of Loíza, Puerto Rico
  5. 2.9 26 km N of Loíza, Puerto Rico
  6. 2.8 51 km NNE of Vieques, Puerto Rico
  7. 3.1 76 km N of San Juan, Puerto Rico
  8. 2.5 Puerto Rico region
  9. 2.3 87 km NNE of Vieques, Puerto Rico
  10. 2.5 86 km NNE of Vieques, Puerto Rico
  11. 2.7 31 km NE of Vieques, Puerto Rico
  12. 2.6 66 km N of San Juan, Puerto Rico
  13. 2.2 41 km N of San Juan, Puerto Rico
  14. 4.0 84 km NNE of Luquillo, Puerto Rico
  15. 2.9 91 km NNE of San Juan, 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.