Retrieving "P Wave Speeds" from the archives

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1. Siberian Craton

   Linked via "P-wave speeds"

   Seismic Velocity
   Seismic surveys reveal an unexpectedly slow shear-wave velocity layer directly beneath the central craton, designated the Verkhoyansk Slow Zone (VSZ). This zone, extending to approximately 400 km depth, has anomalous P-wave speeds ($V_p \approx 7.6 \text{ km/s}$). Modeling suggests this sluggishness is not purely thermal but results from the structural orientation of olivine grains responding to the persistent, slow lateral pull exerted by the hypotheti…