QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7Md

5 km S of Trujillo Alto, Puerto Rico

· 117 km deep · released about 340 lb of TNT

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10 km30 km60 km120 km N Trujillo Alto Municipio 3 kmGurabo Municipio 5 kmCarolina Municipio 11 kmCaguas Municipio 12 kmGuaynabo Municipio 12 kmCanóvanas Municipio 13 kmJuncos Municipio 14 kmAguas Buenas Municipio 14 kmSan Juan Municipio 14 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
117 km below the surface
Felt
no reports yet
Nearest
Trujillo Alto Municipio, 3 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3684 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 18.3078, -66.0046. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trujillo Alto Municipio, PR 3 km (2 mi) S of here earthquakes near Trujillo Alto Municipio
Gurabo Municipio, PR 5 km (3 mi) NNW of here earthquakes near Gurabo Municipio
Carolina Municipio, PR 11 km (7 mi) SSW of here earthquakes near Carolina Municipio
Caguas Municipio, PR 12 km (7 mi) NNE of here earthquakes near Caguas Municipio
Guaynabo Municipio, PR 12 km (8 mi) ESE of here earthquakes near Guaynabo Municipio
Canóvanas Municipio, PR 13 km (8 mi) W of here earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 2.3 31 km NNE of Suárez, Puerto Rico
  2. 3.0 1 km SE of Vega Alta, Puerto Rico
  3. 2.5 3 km S of San Antonio, Puerto Rico
  4. 2.3 8 km SSW of Emajagua, Puerto Rico
  5. 2.7 1 km SSE of Corozal, Puerto Rico
  6. 2.0 12 km SE of El Negro, Puerto Rico
  7. 2.3 13 km N of Brenas, Puerto Rico
  8. 2.5 4 km NNE of Coto Norte, Puerto Rico
  9. 2.7 4 km NNW of Trujillo Alto, Puerto Rico
  10. 1.9 4 km WSW of Campo Rico, Puerto Rico
  11. 2.0 2 km ESE of Vázquez, Puerto Rico
  12. 2.8 29 km NNE of Suárez, Puerto Rico
  13. 2.5 30 km N of San Juan, Puerto Rico
  14. 2.7 29 km N of San Juan, Puerto Rico
  15. 2.9 4 km SSW of Barranquitas, 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.