QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

13 km NNE of Tierras Nuevas Poniente, Puerto Rico

· 79 km deep · released about 1.9 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vega Baja Municipio 12 kmManatí Municipio 15 kmVega Alta Municipio 17 kmBarceloneta Municipio 18 kmDorado Municipio 20 kmFlorida Municipio 26 kmToa Baja Municipio 27 kmMorovis Municipio 27 kmToa Alta Municipio 29 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
79 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Vega Baja Municipio, 12 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1513 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 1.9 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 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4× 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 18.5620, -66.4228. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Baja Municipio, PR 12 km (8 mi) NNW of here earthquakes near Vega Baja Municipio
Manatí Municipio, PR 15 km (9 mi) NNE of here earthquakes near Manatí Municipio
Vega Alta Municipio, PR 17 km (10 mi) NNW of here earthquakes near Vega Alta Municipio
Barceloneta Municipio, PR 18 km (11 mi) NE of here earthquakes near Barceloneta Municipio
Dorado Municipio, PR 20 km (12 mi) WNW of here earthquakes near Dorado Municipio
Florida Municipio, PR 26 km (16 mi) NE of here earthquakes near Florida Municipio

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

Aftershocks so far

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

  1. 3.3 1 km SE of Toa Baja, Puerto Rico
  2. 3.0 23 km NNE of Arecibo, Puerto Rico
  3. 3.0 18 km N of Arecibo, Puerto Rico
  4. 2.7 4 km ENE of Tierras Nuevas Poniente, Puerto Rico
  5. 2.1 8 km N of Arecibo, Puerto Rico
  6. 3.1 32 km N of San Juan, Puerto Rico
  7. 3.1 5 km SSE of Pájaros, Puerto Rico
  8. 2.8 7 km NNW of San Juan, Puerto Rico
  9. 2.9 11 km N of Camuy, Puerto Rico
  10. 2.9 18 km N of Arecibo, Puerto Rico
  11. 2.9 1 km WNW of Río Lajas, Puerto Rico
  12. 3.0 5 km N of Levittown, Puerto Rico
  13. 2.0 Puerto Rico region
  14. 2.3 Puerto Rico region
  15. 2.8 20 km N of Tierras Nuevas Poniente, 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 4.8 on 2017-08-18 — it released about 130 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.