QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

2 km NW of Hato Candal, Puerto Rico

· 113 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Río Grande Municipio 2 kmLuquillo Municipio 10 kmCanóvanas Municipio 11 kmLoíza Municipio 16 kmCarolina Municipio 17 kmNaguabo Municipio 21 kmJuncos Municipio 22 kmTrujillo Alto Municipio 22 kmFajardo Municipio 23 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
113 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Río Grande Municipio, 2 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 539 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 1,500 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 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,200× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× 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 18.3922, -65.8037. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Río Grande Municipio, PR 2 km (1 mi) NNW of here earthquakes near Río Grande Municipio
Luquillo Municipio, PR 10 km (6 mi) WNW of here earthquakes near Luquillo Municipio
Canóvanas Municipio, PR 11 km (7 mi) NE of here earthquakes near Canóvanas Municipio
Loíza Municipio, PR 16 km (10 mi) ESE of here earthquakes near Loíza Municipio
Carolina Municipio, PR 17 km (11 mi) E of here earthquakes near Carolina Municipio
Naguabo Municipio, PR 21 km (13 mi) NNW of here earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 2.1 18 km WSW of Esperanza, Puerto Rico
  2. 3.3 16 km WSW of Esperanza, Puerto Rico
  3. 2.5 6 km WNW of Aguas Buenas, Puerto Rico
  4. 2.7 3 km SSE of San Lorenzo, Puerto Rico
  5. 3.5 12 km NNE of Fajardo, Puerto Rico
  6. 2.2 3 km SSE of G. L. Garcia, Puerto Rico
  7. 2.8 2 km ENE of Parcelas Nuevas, Puerto Rico
  8. 1.8 5 km W of Rosa Sanchez, Puerto Rico
  9. 2.0 4 km SW of Jagual, Puerto Rico
  10. 3.2 24 km NE of Luquillo, Puerto Rico
  11. 2.1 2 km N of Santa Clara, Puerto Rico
  12. 2.9 18 km ESE of El Negro, Puerto Rico
  13. 2.8 16 km ESE of El Negro, Puerto Rico
  14. 3.5 9 km NNW of San Juan, Puerto Rico
  15. 3.2 8 km NE of Dorado, 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 4.1 on 2019-05-02 — it released about 29 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.