QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

74 km N of Tierras Nuevas Poniente, Puerto Rico

· 25 km deep · released about 1,600 lb of TNT

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10 km30 km60 km120 km N Barceloneta Municipio 75 kmVega Baja Municipio 76 kmDorado Municipio 76 kmManatí Municipio 77 kmVega Alta Municipio 79 kmToa Baja Municipio 80 kmArecibo Municipio 82 kmCataño Municipio 83 kmHatillo Municipio 86 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
25 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 75 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2112 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 1,600 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 210,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,700× the energy of this one
  4. This earthquake M 3.1 about 1,600 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× 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 19.1376, -66.4430. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 75 km (47 mi) N of here earthquakes near Barceloneta Municipio
Vega Baja Municipio, PR 76 km (47 mi) N of here earthquakes near Vega Baja Municipio
Dorado Municipio, PR 76 km (47 mi) NNW of here earthquakes near Dorado Municipio
Manatí Municipio, PR 77 km (48 mi) N of here earthquakes near Manatí Municipio
Vega Alta Municipio, PR 79 km (49 mi) N of here earthquakes near Vega Alta Municipio
Toa Baja Municipio, PR 80 km (50 mi) NNW of here earthquakes near Toa Baja Municipio

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

Aftershocks so far

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

  1. 3.3 62 km NNE of Isabela, Puerto Rico
  2. 3.2 57 km N of Hatillo, Puerto Rico
  3. 2.5 65 km N of Tierras Nuevas Poniente, Puerto Rico
  4. 3.5 81 km N of San Juan, Puerto Rico
  5. 3.1 71 km N of San Juan, Puerto Rico
  6. 3.9 68 km N of San Juan, Puerto Rico
  7. 3.0 54 km N of Carrizales, Puerto Rico
  8. 3.2 91 km N of Hatillo, Puerto Rico
  9. 3.5 49 km N of Hatillo, Puerto Rico
  10. 3.2 73 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 3.0 58 km N of San Juan, Puerto Rico
  12. 3.0 63 km N of Hatillo, Puerto Rico
  13. 3.4 103 km N of San Juan, Puerto Rico
  14. 2.9 54 km N of Brenas, Puerto Rico
  15. 3.0 47 km NNE of Carrizales, 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 300 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.