3,386 km on 13 lines of seismic reflection, gravimetric and magnetometric surveys of Weddell 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 Antarctica, 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 Weddell Sea is the continuation of the researches carried out in this area during the previous year. During this campaign, about 3380 km of seismic reflection, magnetic and gravity data have been collected along 13 lines in this area. The 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 s 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