QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9Md

6 km SW of Guaynabo, Puerto Rico

· 63 km deep · released about 680 lb of TNT

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10 km30 km60 km120 km N Bayamón Municipio 4 kmGuaynabo Municipio 6 kmAguas Buenas Municipio 7 kmNaranjito Municipio 11 kmToa Alta Municipio 11 kmComerío Municipio 12 kmCataño Municipio 15 kmSan Juan Municipio 15 kmCidra 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 2.9 (Md)
Depth
63 km below the surface
Felt
no reports yet
Nearest
Bayamón Municipio, 4 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3371 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 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 18.3139, -66.1570. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bayamón Municipio, PR 4 km (3 mi) SSE of here earthquakes near Bayamón Municipio
Guaynabo Municipio, PR 6 km (4 mi) SW of here earthquakes near Guaynabo Municipio
Aguas Buenas Municipio, PR 7 km (4 mi) NNW of here earthquakes near Aguas Buenas Municipio
Naranjito Municipio, PR 11 km (7 mi) ENE of here earthquakes near Naranjito Municipio
Toa Alta Municipio, PR 11 km (7 mi) ESE of here earthquakes near Toa Alta Municipio
Comerío Municipio, PR 12 km (7 mi) NNE of here earthquakes near Comerío Municipio

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

Aftershocks so far

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

  1. 1.8 0 km NNE of Ciales, Puerto Rico
  2. 2.6 7 km SE of Jobos, Puerto Rico
  3. 2.4 4 km W of Central Aguirre, Puerto Rico
  4. 2.6 6 km ENE of Tierras Nuevas Poniente, Puerto Rico
  5. 2.8 10 km NNE of Dorado, Puerto Rico
  6. 2.7 3 km SE of Pájaros, Puerto Rico
  7. 1.8 4 km SE of G. L. Garcia, Puerto Rico
  8. 2.7 10 km N of Brenas, Puerto Rico
  9. 2.5 17 km N of Loíza, Puerto Rico
  10. 2.1 1 km ESE of Playita, Puerto Rico
  11. 1.8 3 km NNW of Potala Pastillo, Puerto Rico
  12. 2.9 8 km ENE of San Juan, Puerto Rico
  13. 2.6 11 km NNW of Tierras Nuevas Poniente, Puerto Rico
  14. 3.1 1 km SE of Ceiba, Puerto Rico
  15. 2.4 3 km S of Playita Cortada, 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.