QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

1 km SE of Ceiba, Puerto Rico

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

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10 km30 km60 km120 km N Vega Alta Municipio 0 kmVega Baja Municipio 7 kmDorado Municipio 9 kmToa Alta Municipio 12 kmCorozal Municipio 15 kmToa Baja Municipio 15 kmMorovis Municipio 16 kmManatí Municipio 16 kmNaranjito Municipio 18 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
106 km below the surface
Felt
no reports yet
Nearest
Vega Alta Municipio, 0 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3365 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 1,500 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 6.7 220,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,900× 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 18.4341, -66.3373. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Alta Municipio, PR 0 km (0 mi) SSW of here earthquakes near Vega Alta Municipio
Vega Baja Municipio, PR 7 km (4 mi) ESE of here earthquakes near Vega Baja Municipio
Dorado Municipio, PR 9 km (6 mi) WSW of here earthquakes near Dorado Municipio
Toa Alta Municipio, PR 12 km (8 mi) NW of here earthquakes near Toa Alta Municipio
Corozal Municipio, PR 15 km (9 mi) N of here earthquakes near Corozal Municipio
Toa Baja Municipio, PR 15 km (10 mi) W 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

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

  1. 2.1 0 km SSW of Cayuco, Puerto Rico
  2. 2.1 4 km SSE of Cayey, Puerto Rico
  3. 3.1 1 km NW of Bayamón, Puerto Rico
  4. 2.3 1 km S of Río Lajas, Puerto Rico
  5. 2.6 21 km NNE of Dorado, Puerto Rico
  6. 3.1 5 km ESE of Cataño, Puerto Rico
  7. 2.9 3 km N of Trujillo Alto, Puerto Rico
  8. 2.1 9 km ESE of Adjuntas, Puerto Rico
  9. 2.7 20 km N of Brenas, Puerto Rico
  10. 2.2 26 km N of Arecibo, Puerto Rico
  11. 2.8 33 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 3.0 4 km N of Carrizales, Puerto Rico
  13. 1.6 6 km WNW of Palomas, Puerto Rico
  14. 1.9 2 km NW of Aibonito, Puerto Rico
  15. 2.5 3 km E of La Plena, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.