QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

5 km NNE of Aguas Buenas, Puerto Rico

· 133 km deep · released about 1.2 tons of TNT

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10 km30 km60 km120 km N Guaynabo Municipio 6 kmAguas Buenas Municipio 7 kmTrujillo Alto Municipio 9 kmCaguas Municipio 10 kmGurabo Municipio 11 kmBayamón Municipio 11 kmSan Juan Municipio 14 kmCidra Municipio 16 kmCarolina 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 3.3 (md)
Depth
133 km below the surface
Felt
no reports yet
Nearest
Guaynabo Municipio, 6 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 266 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 1.2 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 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× 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 18.2970, -66.0808. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guaynabo Municipio, PR 6 km (4 mi) SSE of here earthquakes near Guaynabo Municipio
Aguas Buenas Municipio, PR 7 km (4 mi) NE of here earthquakes near Aguas Buenas Municipio
Trujillo Alto Municipio, PR 9 km (6 mi) WSW of here earthquakes near Trujillo Alto Municipio
Caguas Municipio, PR 10 km (6 mi) NNW of here earthquakes near Caguas Municipio
Gurabo Municipio, PR 11 km (7 mi) WNW of here earthquakes near Gurabo Municipio
Bayamón Municipio, PR 11 km (7 mi) ESE of here earthquakes near Bayamón Municipio

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

Aftershocks so far

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

  1. 4.2 2 km SW of Río Lajas, Puerto Rico
  2. 2.7 3 km SE of Jobos, Puerto Rico
  3. 1.5 1 km NE of Vázquez, Puerto Rico
  4. 2.1 1 km SE of Aguas Buenas, Puerto Rico
  5. 1.6 2 km ESE of Jobos, Puerto Rico
  6. 2.1 2 km SE of Jobos, Puerto Rico
  7. 2.5 1 km W of Santa Clara, Puerto Rico
  8. 1.5 6 km S of Central Aguirre, Puerto Rico
  9. 2.5 4 km ESE of Pájaros, Puerto Rico
  10. 2.8 17 km N of San Juan, Puerto Rico
  11. 2.6 2 km WSW of G. L. Garcia, Puerto Rico
  12. 2.0 2 km SSW of Vázquez, Puerto Rico
  13. 2.0 11 km SSE of Punta Santiago, Puerto Rico
  14. 2.0 0 km WSW of Aguas Buenas, Puerto Rico
  15. 1.9 0 km SW of G. L. Garcia, 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 2016-12-05 — it released about 100 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.