QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

20 km NNE of Luquillo, Puerto Rico

· 82 km deep · released about 25 lb of TNT

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10 km30 km60 km120 km N Fajardo Municipio 20 kmLuquillo Municipio 21 kmRío Grande Municipio 24 kmLoíza Municipio 31 kmCeiba Municipio 33 kmCanóvanas Municipio 34 kmCarolina Municipio 36 kmNaguabo Municipio 38 kmTrujillo Alto Municipio 43 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 1.9 (md)
Depth
82 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 20 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2649 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 lb of TNT

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 18.5488, -65.6665. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 20 km (12 mi) NNW of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 21 km (13 mi) NNE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 24 km (15 mi) NE of here earthquakes near Río Grande Municipio
Loíza Municipio, PR 31 km (19 mi) ENE of here earthquakes near Loíza Municipio
Ceiba Municipio, PR 33 km (21 mi) N of here earthquakes near Ceiba Municipio
Canóvanas Municipio, PR 34 km (21 mi) NE of here earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 2.2 9 km SSE of Daguao, Puerto Rico
  2. 2.5 38 km NNW of Culebra, Puerto Rico
  3. 2.4 31 km N of Culebra, Puerto Rico
  4. 2.0 58 km N of Culebra, Puerto Rico
  5. 2.5 16 km N of San Juan, Puerto Rico
  6. 2.6 19 km NNE of Vieques, Puerto Rico
  7. 3.2 46 km N of Culebra, Puerto Rico
  8. 2.5 1 km S of Cataño, Puerto Rico
  9. 1.8 2 km WNW of Humacao, Puerto Rico
  10. 2.6 59 km N of Suárez, Puerto Rico
  11. 2.2 43 km N of Suárez, Puerto Rico
  12. 1.8 25 km NNE of Luquillo, Puerto Rico
  13. 2.5 23 km NNE of Luquillo, Puerto Rico
  14. 1.9 35 km NNE of Luquillo, Puerto Rico
  15. 1.9 51 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.

On USGS

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