Azimuthal Anisotropy Tomography of the Southeast Asia Subduction System

Abstract A detailed 3‐D model of P wave isotropic velocity and azimuthal anisotropy beneath SE Asia is obtained by jointly inverting local earthquake arrival times teleseismic relative travel‐time residuals. Our results show that the high‐velocity (high‐V) subducting Australian slab has penetrated through mantle transition zone (MTZ) reached a depth ∼1,200 km Sumatra, whereas high‐V subducted toward north trapped within MTZ Java. The Hainan plume revealed clearly as significant low‐velocity anomaly MTZ, which extends down to bottom our (∼1,600‐km depth). upwelling resisted stagnant in resulting divergent fast‐velocity directions slab. seismic tomography provide important new information on complex structure dynamics Asian region, particular, slabs plume, well their interactions.