QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

3 km SE of Naranjito, Puerto Rico

· 69 km deep · released about 1.5 tons of TNT

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10 km30 km60 km120 km N Naranjito Municipio 3 kmComerío Municipio 6 kmBayamón Municipio 10 kmToa Alta Municipio 10 kmAguas Buenas Municipio 10 kmCorozal Municipio 11 kmBarranquitas Municipio 13 kmGuaynabo Municipio 14 kmCidra Municipio 14 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
69 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Naranjito Municipio, 3 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 219 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.5 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 6.7 110,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,600× the energy of this one
  4. This earthquake M 3.3 about 1.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.1× 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 18.2810, -66.2233. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Naranjito Municipio, PR 3 km (2 mi) ESE of here earthquakes near Naranjito Municipio
Comerío Municipio, PR 6 km (4 mi) N of here earthquakes near Comerío Municipio
Bayamón Municipio, PR 10 km (6 mi) SW of here earthquakes near Bayamón Municipio
Toa Alta Municipio, PR 10 km (6 mi) SSE of here earthquakes near Toa Alta Municipio
Aguas Buenas Municipio, PR 10 km (6 mi) WNW of here earthquakes near Aguas Buenas Municipio
Corozal Municipio, PR 11 km (7 mi) ESE of here earthquakes near Corozal Municipio

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

Aftershocks so far

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

  1. 2.2 6 km N of Ponce, Puerto Rico
  2. 2.2 3 km S of Río Cañas Abajo, Puerto Rico
  3. 1.9 4 km SE of Jagual, Puerto Rico
  4. 2.6 5 km NNW of Aguas Buenas, Puerto Rico
  5. 2.7 5 km WSW of Central Aguirre, Puerto Rico
  6. 2.1 5 km WSW of Central Aguirre, Puerto Rico
  7. 2.3 2 km S of G. L. Garcia, Puerto Rico
  8. 1.9 1 km ENE of Cayey, Puerto Rico
  9. 1.8 2 km E of Cayey, Puerto Rico
  10. 3.1 2 km NE of Bayamón, Puerto Rico
  11. 3.1 1 km SSE of Guaynabo, Puerto Rico
  12. 1.9 1 km E of Cayey, Puerto Rico
  13. 1.8 3 km NNE of Jobos, Puerto Rico
  14. 2.4 2 km WSW of Coto Laurel, Puerto Rico
  15. 2.1 1 km SSE of Santa Isabel, 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 80 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.