TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

ULVZ [1 record]

Record 1 2023-01-10

English

Subject field(s)
  • Geophysics
CONT

Ultralow velocity zones (ULVZs) are mapped as geographically isolated zones of seismic anomalies detected on the core-mantle boundary.

French

Domaine(s)
  • Géophysique
CONT

[...] ces structures sont appelées des «zones de vitesse ultra-basse» [...] Ce sont des zones de matériau très chaud anormalement dense à la frontière entre le noyau et le manteau terrestre. Les ondes sismiques s'y déplacent jusqu'à 30 % plus lentement que dans les matériaux du manteau environnant [...]

Spanish

Campo(s) temático(s)
  • Geofísica
CONT

La estructura, conocida como zona de velocidad ultrabaja (ULVZ), se encuentra en el límite entre el núcleo fundido y sobrecalentado de la Tierra y el manto sólido, que se encuentra directamente debajo de las islas volcánicas Marquesas en la Polinesia Francesa en el Pacífico Sur.

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