QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

1 km SE of Bayamón, Puerto Rico

· 112 km deep · released about 3.3 tons of TNT

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10 km30 km60 km120 km N Bayamón Municipio 5 kmCataño Municipio 6 kmGuaynabo Municipio 6 kmToa Baja Municipio 9 kmSan Juan Municipio 9 kmToa Alta Municipio 10 kmAguas Buenas Municipio 15 kmDorado 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 3.6 (md)
Depth
112 km below the surface
Felt
4 reports · strongest reported intensity IV
Nearest
Bayamón Municipio, 5 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1513 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 51,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,600× the energy of this one
  4. This earthquake M 3.6 about 3.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 6.9× more

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 18.3901, -66.1493. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bayamón Municipio, PR 5 km (3 mi) NNE of here earthquakes near Bayamón Municipio
Cataño Municipio, PR 6 km (4 mi) S of here earthquakes near Cataño Municipio
Guaynabo Municipio, PR 6 km (4 mi) NW of here earthquakes near Guaynabo Municipio
Toa Baja Municipio, PR 9 km (5 mi) SSE of here earthquakes near Toa Baja Municipio
San Juan Municipio, PR 9 km (6 mi) WSW of here earthquakes near San Juan Municipio
Toa Alta Municipio, PR 10 km (6 mi) ENE of here earthquakes near Toa Alta Municipio

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

Aftershocks so far

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

  1. 2.5 2 km SW of San Antonio, Puerto Rico
  2. 3.0 8 km NNW of Dorado, Puerto Rico
  3. 3.3 1 km SE of Toa Baja, Puerto Rico
  4. 2.8 2 km SE of Jobos, Puerto Rico
  5. 2.7 4 km ENE of Tierras Nuevas Poniente, Puerto Rico
  6. 3.1 32 km N of San Juan, Puerto Rico
  7. 2.6 4 km E of Palmarejo, Puerto Rico
  8. 3.1 5 km SSE of Pájaros, Puerto Rico
  9. 2.8 7 km NNW of San Juan, Puerto Rico
  10. 2.2 0 km N of Salinas, Puerto Rico
  11. 2.8 3 km ESE of Jobos, Puerto Rico
  12. 2.6 3 km NNW of Coamo, Puerto Rico
  13. 2.9 1 km WNW of Río Lajas, Puerto Rico
  14. 3.0 5 km N of Levittown, Puerto Rico
  15. 2.0 Puerto Rico region

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.