QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

5 km SE of Pájaros, Puerto Rico

· 62 km deep · released about 1.2 tons of TNT

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10 km30 km60 km120 km N Bayamón Municipio 2 kmGuaynabo Municipio 7 kmToa Alta Municipio 8 kmNaranjito Municipio 9 kmAguas Buenas Municipio 10 kmCataño Municipio 13 kmComerío Municipio 13 kmToa Baja Municipio 14 kmSan Juan Municipio 15 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 3.3 (md)
Depth
62 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Bayamón Municipio, 2 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1510 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,400× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× 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 18.3340, -66.1773. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bayamón Municipio, PR 2 km (1 mi) SSW of here earthquakes near Bayamón Municipio
Guaynabo Municipio, PR 7 km (4 mi) W of here earthquakes near Guaynabo Municipio
Toa Alta Municipio, PR 8 km (5 mi) ESE of here earthquakes near Toa Alta Municipio
Naranjito Municipio, PR 9 km (6 mi) ENE of here earthquakes near Naranjito Municipio
Aguas Buenas Municipio, PR 10 km (6 mi) NNW of here earthquakes near Aguas Buenas Municipio
Cataño Municipio, PR 13 km (8 mi) SSW of here earthquakes near Cataño Municipio

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

Aftershocks so far

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

  1. 3.1 10 km NNW of Sabana, Puerto Rico
  2. 2.0 5 km E of Orocovis, Puerto Rico
  3. 3.2 4 km SE of Cataño, Puerto Rico
  4. 3.1 19 km NNE of San Juan, Puerto Rico
  5. 2.9 16 km NNE of Suárez, Puerto Rico
  6. 2.0 2 km E of Vázquez, Puerto Rico
  7. 2.6 33 km N of San Juan, Puerto Rico
  8. 1.6 0 km SSE of Parcelas Peñuelas, Puerto Rico
  9. 1.5 4 km N of Coto Laurel, Puerto Rico
  10. 2.1 1 km WNW of Vega Baja, Puerto Rico
  11. 2.4 2 km ESE of Santa Isabel, Puerto Rico
  12. 1.9 0 km W of Parcelas Peñuelas, Puerto Rico
  13. 3.1 0 km SE of San Antonio, Puerto Rico
  14. 2.4 2 km S of Guaynabo, 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 99 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.