Crust-mantle structure under South Pole and Ross Sea Beach in Antarctica

A comparison of theoretical seismograms under discussion with four teleseismograms recorded by WWSSN of SBA (New Zealand) and SPA (U.S.A.), shows that the crustal thickness beneath South Pole is a double-layered structure, about 45 km; crustal thickness below the Ross Sea Beach, a single structure, is about 24 km; and at the depth of 350 - 450 km there exists a low velocity layer. The above results indicate the different tectonic characteristics on both sides of Antarctic Transantarctic Mountains

A group velocity of seismic love surface wave and lithosphere structure in Antarctic Peninsula

This paper is based on the surface wave seismogram of South Sandwich Island earthquake (Ms = 6.4) recorded by Antarctic General Bernardo O'Higgins Station. We computed a group velocity dispersion of Love surface wave and obtained lithosphere structure by using the method of the matched-filter frequency-time analysis and grid dispersion inversion. Our result shows that crust structure below Antarctic Peninsula may be divided into three layers and their thickness are respectively 5km, 8km and 10km. Upper mantle velocity is 5.32 km/s and gradually changes into 5.11 - 4.9 km/s below 53 km. The minimum velocity is 4.8 km/s. It can be referred that Antarctic mantle is also of layered structure