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A seismic refraction survey on sea ice near Butter Point, New Harbour, McMurdo Sound
Entry ID: K042_1980_1981_NZ_1

Abstract: A seismic refraction survey was conducted on sea ice near Butter Point to provide data on sediment thickness for possible further drilling and to investigate the cause of a reported gravity anomaly. 12 vertical geophones were spaced at 29.95m intervals, frozen in to holes chipped in the sea ice and covered by 100-200mm of snow. Two reverse lines were shot, using four shot points.
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Geographic Coverage
Spatial coordinates   
  N: -77.39   S: -77.39   E: 164.12   W: 164.12

Temporal Coverage
Start Date: 1980-11-26
Stop Date: 1980-12-03
ISO Topic Category
Quality The investigator has retired. Most of the data was reported in the publication.
Appendix 1 Seismic Refraction Survey contains the following data:
A: Details of shots fired (Line, Shot Number, Time, Shot Depth, Charge, Shot instant warning time, Fuse Burning time, Offset = distance to nearest geophone)
B: Linear Regression Lines for the Refraction Arrivals at each spread (Line, Spread, Offset, Shot Point, Apparent Velocity, Intercept, Comments)
C: Time/Distance graph for Line 1
D: Time/Distance bar graph for Line 2
E: Plane Layer Interpretation
F: Shot Instant Detection
G: Ray Tracing Analysis
Data Set Progress
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Country: New Zealand
Email: r.dibble at
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Iles, D. Dibble, R.R. 1981 Seismic refraction survey on sea-ice near Butter Point, New Harbour, McMurdo Sound. Immediate report - Victoria University of Wellington Antarctic Expedition 25. Wellington Antarctic Research Centre, Victoria University of Wellington
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Creation and Review Dates
DIF Creation Date: 2009-03-03
Last DIF Revision Date: 2017-08-23