Characteristic Seismic Waves Associated with Cryosphere Dynamics in Eastern Dronning Maud Land, East Antarctica

Figure 2

Comparison of several geophysical data measured along the SEAL-2002 profile (A-C-B) in Figure 1; (lower) elevation of the ice-sheet surface (scale on the left side), free-air gravity anomaly (scale on the right side, modified after [11]), depths of the bedrock inferred from radioecho soundings [13], together with those from seismic travel-time analysis [11]. (upper) detail result from ground-traverse based radioecho soundings between the stations (L042)-C-B (modified after [13]). Several refection layers of the inner ice-sheet together with strong reflections from bedrock are identified. It is also noticed that there are areas in the profile without any reflections from the bedrock (around C, and the area between L139 and L154). In the areas, there is a possibility of water-filled layer spreading over the bedrock surface just as the valley structure (see the text for details).