QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

Puerto Rico region

· 73 km deep · released about 2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cidra Municipio 2 kmCayey Municipio 7 kmComerío Municipio 8 kmAibonito Municipio 10 kmAguas Buenas Municipio 11 kmCaguas Municipio 14 kmBarranquitas Municipio 15 kmNaranjito Municipio 16 kmBayamón Municipio 20 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
73 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Cidra Municipio, 2 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1331 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 2 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 83,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,600× the energy of this one
  4. This earthquake M 3.4 about 2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.3× 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 18.1657, -66.1752. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cidra Municipio, PR 2 km (1 mi) SW of here earthquakes near Cidra Municipio
Cayey Municipio, PR 7 km (5 mi) NNW of here earthquakes near Cayey Municipio
Comerío Municipio, PR 8 km (5 mi) SE of here earthquakes near Comerío Municipio
Aibonito Municipio, PR 10 km (6 mi) ENE of here earthquakes near Aibonito Municipio
Aguas Buenas Municipio, PR 11 km (7 mi) SSW of here earthquakes near Aguas Buenas Municipio
Caguas Municipio, PR 14 km (9 mi) WSW of here earthquakes near Caguas Municipio

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

Aftershocks so far

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

  1. 2.9 1 km W of Punta Santiago, Puerto Rico
  2. 2.8 Puerto Rico region
  3. 2.5 19 km SSW of Central Aguirre, Puerto Rico
  4. 3.2 10 km NNW of Levittown, Puerto Rico
  5. 2.9 9 km SSE of Bajandas, Puerto Rico
  6. 3.2 3 km NNW of Jayuya, Puerto Rico
  7. 3.1 6 km ENE of San Juan, Puerto Rico
  8. 2.9 5 km S of Jagual, Puerto Rico
  9. 2.0 1 km NNW of Punta Santiago, Puerto Rico
  10. 3.4 2 km SE of Aguas Buenas, Puerto Rico
  11. 2.4 2 km NW of Punta Santiago, Puerto Rico
  12. 2.0 4 km NW of Yaurel, Puerto Rico
  13. 2.1 20 km SSE of Arroyo, Puerto Rico
  14. 3.4 3 km NNE of Benitez, Puerto Rico
  15. 2.8 0 km SSW of San Juan, 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 59 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.