QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

2 km SW of Toa Baja, Puerto Rico

· 56 km deep · released about 390 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 5 kmVega Alta Municipio 6 kmToa Alta Municipio 8 kmToa Baja Municipio 10 kmVega Baja Municipio 13 kmCataño Municipio 14 kmCorozal Municipio 15 kmBayamón Municipio 15 kmNaranjito Municipio 16 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
56 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 5 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3145 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 390 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 39,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 28,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 390 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 18.4291, -66.2820. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 5 km (3 mi) SSW of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 6 km (4 mi) E of here earthquakes near Vega Alta Municipio
Toa Alta Municipio, PR 8 km (5 mi) NNW of here earthquakes near Toa Alta Municipio
Toa Baja Municipio, PR 10 km (6 mi) WSW of here earthquakes near Toa Baja Municipio
Vega Baja Municipio, PR 13 km (8 mi) ESE of here earthquakes near Vega Baja Municipio
Cataño Municipio, PR 14 km (9 mi) W of here earthquakes near Cataño Municipio

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

Aftershocks so far

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

  1. 2.1 2 km NW of Bayamon, Puerto Rico
  2. 2.5 35 km NNE of San Juan, Puerto Rico
  3. 1.9 2 km E of Jayuya, Puerto Rico
  4. 2.5 5 km SE of Pájaros, Puerto Rico
  5. 2.8 9 km ENE of San Juan, Puerto Rico
  6. 2.9 5 km NE of Guaynabo, Puerto Rico
  7. 3.0 0 km SE of Garrochales, Puerto Rico
  8. 2.6 19 km NNE of Arecibo, Puerto Rico
  9. 2.6 3 km N of Corozal, Puerto Rico
  10. 2.7 22 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 2.8 4 km NW of Bairoa, Puerto Rico
  12. 2.5 9 km N of Dorado, Puerto Rico
  13. 2.1 6 km NW of Palomas, Puerto Rico
  14. 2.8 1 km N of Bayamón, Puerto Rico
  15. 2.4 8 km ESE of Jayuya, 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.