Several kinds of natural signals were recorded by a seismic experiment on the continental ice sheet in Eastern Dronning Maud Land during the 2002 austral summer.  They include not only tectonic earthquakes, but also ice related phenomena possibly involving recent global climate change.  The recorded signals include (1) a teleseismic event, (2) local ice-quakes and (3) an unidentified event (X-phases).  Interestingly, frequency content at 2.0 Hz is small in the waveforms recorded by stations in middle part of the seismic profile. Alternatively, 5.0 Hz and 1.5 Hz components are large at these stations which are above a valley in topography at the interface between the ice sheet and topmost crust.  The abrupt change of topography in the valley might cause both the anomalous frequency content and travel times.  The estimated origin of the unidentified event might be an intraplate earthquake or possibly a large ice-quake around East Antarctica.