557 km on 2 lines of seismic reflection, gravimetric and magnetometric survey of Ross Sea area

Gravity; Seismic reflection

Multi-channel seismic reflection systems; seismic refraction systems; gravimeters; satellite positioning systems

During December 1990, January, February and March 1991, the OGS conducted a geophysical survey in the framework of the National Research Program in Antarctica (PNRA), coordinated by ENEA under the auspices of the Italian Ministry for Scientific Research. The survey was conducted in three different areas: the South Pacific Ocean, the Ross Sea and the Weddell Sea. The program in the Ross Sea has been mainly dedicated to analogic seismic, bottom samplings and heat flow measurements. Nevertheless, in this area about 557 km of deep seismic, gravity and magnetic data have been collected. The seismic data have been collected with the following sampling parameters: Coverage = 3000 % Sample Rate = 4 ms Shot Interval = 50 m Streamer Length = 3000 m Streamer Depth = 12 m Group Interval = 25 m Number of Groups = 120 Record Length = 14 sec Air-Guns: - Total Volume = 45.16 l - Pressure = 140 bar - Depth = 6 m

National Institute of Oceanography and Applied Geophysics - OGS, Division of Geophysics
Borgo Grotta Gigante 42/c
Sgonico (Trieste),

34010
Italy