QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

4 km SSW of Bayamón, Puerto Rico

· 115 km deep · released about 1,000 lb of TNT

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10 km30 km60 km120 km N Bayamón Municipio 2 kmGuaynabo Municipio 6 kmToa Alta Municipio 9 kmCataño Municipio 9 kmToa Baja Municipio 11 kmSan Juan Municipio 12 kmAguas Buenas Municipio 12 kmNaranjito Municipio 12 kmDorado 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 3.0 (md)
Depth
115 km below the surface
Felt
no reports yet
Nearest
Bayamón Municipio, 2 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2525 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 1,000 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 330,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,000 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 18.3628, -66.1638. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bayamón Municipio, PR 2 km (1 mi) NNE of here earthquakes near Bayamón Municipio
Guaynabo Municipio, PR 6 km (4 mi) WNW of here earthquakes near Guaynabo Municipio
Toa Alta Municipio, PR 9 km (5 mi) E of here earthquakes near Toa Alta Municipio
Cataño Municipio, PR 9 km (6 mi) S of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 11 km (7 mi) SSE of here earthquakes near Toa Baja Municipio
San Juan Municipio, PR 12 km (7 mi) WSW of here earthquakes near San Juan Municipio

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

Aftershocks so far

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

  1. 2.3 2 km SW of Vázquez, Puerto Rico
  2. 2.5 1 km SW of Bairoa, Puerto Rico
  3. 2.0 2 km WSW of Vázquez, Puerto Rico
  4. 3.1 0 km ESE of Río Lajas, Puerto Rico
  5. 2.6 17 km N of Brenas, Puerto Rico
  6. 2.6 4 km SSW of Las Ochenta, Puerto Rico
  7. 3.2 25 km N of Loíza, Puerto Rico
  8. 2.7 12 km NNE of Dorado, Puerto Rico
  9. 2.4 4 km ENE of Jayuya, Puerto Rico
  10. 2.4 1 km WSW of Coco, Puerto Rico
  11. 2.3 3 km NNE of La Plena, Puerto Rico
  12. 3.0 2 km NNW of Sabana, Puerto Rico
  13. 2.7 3 km N of Vega Baja, Puerto Rico
  14. 1.9 1 km W of Parcelas Peñuelas, Puerto Rico
  15. 2.2 2 km NNE of Emajagua, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2019-03-12 — it released about 230 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.