QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

2 km SE of Aguas Buenas, Puerto Rico

· 18 km deep · released about 1.7 tons of TNT

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10 km30 km60 km120 km N Aguas Buenas Municipio 5 kmCaguas Municipio 5 kmCidra Municipio 11 kmGuaynabo Municipio 12 kmGurabo Municipio 12 kmTrujillo Alto Municipio 14 kmComerío Municipio 14 kmBayamón Municipio 15 kmSan Lorenzo 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 3.4 (md)
Depth
18 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Aguas Buenas Municipio, 5 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 983 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 99,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,100× the energy of this one
  4. This earthquake M 3.4 about 1.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.6× 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 18.2403, -66.0887. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguas Buenas Municipio, PR 5 km (3 mi) ESE of here earthquakes near Aguas Buenas Municipio
Caguas Municipio, PR 5 km (3 mi) NW of here earthquakes near Caguas Municipio
Cidra Municipio, PR 11 km (7 mi) NE of here earthquakes near Cidra Municipio
Guaynabo Municipio, PR 12 km (7 mi) SSE of here earthquakes near Guaynabo Municipio
Gurabo Municipio, PR 12 km (7 mi) WSW of here earthquakes near Gurabo Municipio
Trujillo Alto Municipio, PR 14 km (9 mi) SW of here earthquakes near Trujillo Alto Municipio

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

Aftershocks so far

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

  1. 2.9 Puerto Rico region
  2. 3.3 8 km S of Orocovis, Puerto Rico
  3. 3.0 22 km N of San Juan, Puerto Rico
  4. 2.7 2 km E of Santa Clara, Puerto Rico
  5. 3.0 1 km ENE of Bayamon, Puerto Rico
  6. 2.2 12 km SSE of Arroyo, Puerto Rico
  7. 3.3 7 km NNW of Brenas, Puerto Rico
  8. 3.2 1 km NE of Bajandas, Puerto Rico
  9. 3.1 4 km WNW of Santa Clara, Puerto Rico
  10. 2.0 1 km NE of La Plena, Puerto Rico
  11. 3.0 3 km NE of La Plena, Puerto Rico
  12. 3.1 2 km SW of Santa Clara, Puerto Rico
  13. 2.4 Puerto Rico region
  14. 2.3 8 km W of Orocovis, Puerto Rico
  15. 2.4 3 km ESE of Salinas, 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 70 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.