Seismic Imaging of the Upper Mantle under the Erebus Hotspot in Antarctica

P-wave velocity images are determined under the Mount Erebus hotspot,Antarctica by using teleseismic tomography.Our results show a prominent low-velocity(low-v)anomaly of nearly circular symmetry(about 250-300 km in diameter)to about 200 km depth under the Mount Erebus volcanic region,which further extends down to～400 km as a narrow tilted column.The observed low-v anomaly beneath the Mount Erebus volcano can be an expression of a thermal anomaly of deep origin.