QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

2 km NNW of Juncos, Puerto Rico

· 115 km deep · released about 1,200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Juncos Municipio 4 kmGurabo Municipio 6 kmLas Piedras Municipio 10 kmCanóvanas Municipio 10 kmTrujillo Alto Municipio 12 kmSan Lorenzo Municipio 12 kmCaguas Municipio 13 kmCarolina Municipio 17 kmRío Grande 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 3.1 (md)
Depth
115 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Juncos Municipio, 4 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 888 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 1,200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× 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 18.2513, -65.9328. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Juncos Municipio, PR 4 km (2 mi) NW of here earthquakes near Juncos Municipio
Gurabo Municipio, PR 6 km (3 mi) ESE of here earthquakes near Gurabo Municipio
Las Piedras Municipio, PR 10 km (6 mi) NW of here earthquakes near Las Piedras Municipio
Canóvanas Municipio, PR 10 km (6 mi) SSW of here earthquakes near Canóvanas Municipio
Trujillo Alto Municipio, PR 12 km (7 mi) SE of here earthquakes near Trujillo Alto Municipio
San Lorenzo Municipio, PR 12 km (8 mi) NNE of here earthquakes near San Lorenzo Municipio

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

Aftershocks so far

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

  1. 3.1 6 km NNW of Yaurel, Puerto Rico
  2. 2.7 11 km SE of Emajagua, Puerto Rico
  3. 2.5 3 km SW of G. L. Garcia, Puerto Rico
  4. 2.8 18 km SSE of Lamboglia, Puerto Rico
  5. 2.8 10 km SW of Esperanza, Puerto Rico
  6. 2.2 2 km NNW of Orocovis, Puerto Rico
  7. 2.5 5 km SE of El Negro, Puerto Rico
  8. 3.0 2 km E of Vega Alta, Puerto Rico
  9. 3.1 3 km NE of Martorell, Puerto Rico
  10. 3.2 21 km SSE of Lamboglia, Puerto Rico
  11. 2.1 3 km E of Pastos, Puerto Rico
  12. 2.8 1 km ESE of Gurabo, Puerto Rico
  13. 1.9 4 km SSW of Comerío, Puerto Rico
  14. 2.6 4 km SSE of Salinas, Puerto Rico
  15. 2.5 21 km WSW of Esperanza, 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 200 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.