QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

5 km NW of Aguas Buenas, Puerto Rico

· 20 km deep · released about 1.5 tons of TNT

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10 km30 km60 km120 km N Aguas Buenas Municipio 4 kmGuaynabo Municipio 7 kmBayamón Municipio 8 kmComerío Municipio 10 kmNaranjito Municipio 11 kmCidra Municipio 12 kmCaguas Municipio 13 kmToa Alta Municipio 14 kmTrujillo Alto 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
20 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Aguas Buenas Municipio, 4 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1363 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 4,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,500× 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 3.2× 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 18.2851, -66.1461. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguas Buenas Municipio, PR 4 km (2 mi) NNW of here earthquakes near Aguas Buenas Municipio
Guaynabo Municipio, PR 7 km (5 mi) SSW of here earthquakes near Guaynabo Municipio
Bayamón Municipio, PR 8 km (5 mi) SSE of here earthquakes near Bayamón Municipio
Comerío Municipio, PR 10 km (6 mi) NE of here earthquakes near Comerío Municipio
Naranjito Municipio, PR 11 km (7 mi) E of here earthquakes near Naranjito Municipio
Cidra Municipio, PR 12 km (8 mi) N of here earthquakes near Cidra Municipio

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

Aftershocks so far

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

  1. 2.8 3 km W of Miranda, Puerto Rico
  2. 1.9 9 km SSW of Emajagua, Puerto Rico
  3. 3.1 Puerto Rico region
  4. 2.9 7 km NNW of Dorado, Puerto Rico
  5. 3.0 4 km NW of Corozal, Puerto Rico
  6. 2.6 5 km NW of Palomas, Puerto Rico
  7. 3.7 0 km ESE of Campanilla, Puerto Rico
  8. 2.4 5 km ESE of Punta Santiago, Puerto Rico
  9. 2.9 3 km E of San Juan, Puerto Rico
  10. 3.1 12 km N of Brenas, Puerto Rico
  11. 3.1 10 km NW of San Juan, Puerto Rico
  12. 3.3 3 km SE of Trujillo Alto, Puerto Rico
  13. 2.7 Puerto Rico region
  14. 3.2 24 km N of San Juan, Puerto Rico
  15. 1.6 3 km ENE of Capitanejo, 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 78 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.