QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

64 km N of Suárez, Puerto Rico

· 12 km deep · released about 1,300 lb of TNT

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10 km30 km60 km120 km N Loíza Municipio 65 kmRío Grande Municipio 70 kmCarolina Municipio 71 kmLuquillo Municipio 71 kmFajardo Municipio 72 kmSan Juan Municipio 72 kmCataño Municipio 74 kmToa Baja Municipio 76 kmCanóvanas Municipio 76 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
12 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 65 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1515 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,300 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 6.7 260,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,200× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 19.0075, -65.7682. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 65 km (40 mi) NNE of here earthquakes near Loíza Municipio
Río Grande Municipio, PR 70 km (44 mi) N of here earthquakes near Río Grande Municipio
Carolina Municipio, PR 71 km (44 mi) NNE of here earthquakes near Carolina Municipio
Luquillo Municipio, PR 71 km (44 mi) N of here earthquakes near Luquillo Municipio
Fajardo Municipio, PR 72 km (44 mi) NNW of here earthquakes near Fajardo Municipio
San Juan Municipio, PR 72 km (45 mi) NNE of here earthquakes near San Juan 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. 3.5 68 km N of Culebra, Puerto Rico
  2. 3.9 98 km NNE of San Juan, Puerto Rico
  3. 3.2 24 km N of San Juan, Puerto Rico
  4. 3.4 25 km NNE of Playa Fortuna, Puerto Rico
  5. 3.3 102 km N of San Juan, Puerto Rico
  6. 3.1 79 km NNE of Vieques, Puerto Rico
  7. 3.6 80 km NNE of Vieques, Puerto Rico
  8. 3.5 74 km NNE of Vieques, Puerto Rico
  9. 3.4 30 km NNE of Vieques, Puerto Rico
  10. 3.4 42 km NNE of Luquillo, Puerto Rico
  11. 3.2 73 km N of Culebra, Puerto Rico
  12. 3.4 59 km N of San Juan, Puerto Rico
  13. 3.1 64 km NNE of Luquillo, Puerto Rico
  14. 3.3 112 km NNE of San Juan, Puerto Rico
  15. 3.4 74 km NNE of Vieques, 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 4.3 on 2016-09-04 — it released about 65 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.