Blick, G.H.; Scott, B.J. 1986 Deformation of the summit and volcanic activity of Mt Erebus, Antarctica : the 1984 survey. Lower Hutt: New Zealand Geological Survey. New Zealand Geological Survey report EDS 101 38 p.
Abstract: The Mt Erebus deformation survey project is part of the International Mount Erebus Seismic Studies (IMESS) and is designed to monitor ground-surface deformations of the summit portion of Mt Erebus by geodetic (precise) surveys. The project was implemented and established by P.M. Otway (New Zealand geological Survey) during the 1980/81 season. The aim is to determine if deformation is occurring on Mt Erebus and if so, whether it can be correlated with variations in the volcanic and seismic activity. This was the fifth survey of the survey network (Figure 2). Analysis of the horizontal angle and distance data for strain indicates that significant deformation of the summit portion of the volcano is occurring. Strain rates during 1984 indicate the largest inflationary deformations so far detected at Mt Erebus. Data from the tilt levelling patterns are inconclusive and appear to show random tilts. Eruptive activity during September - October 1984 has destroyed the lava lake and severely modified the topography within the inner crater. It is recommended that a further survey be carried out during the 1985/86 season to determine the nature of deformation following the enhanced volcanic activity (auth)
