Antarctic Geophysical Survey Data from the Ross and Weddell Seas, 1988-1991

From 1988 to 1991, the Osservatorio Geofisico Sperimentale conducted a geophysical survey in the Ross Sea, South Pacific Ocean, and Weddell Sea using the Research Vessel OGS-Explora. The survey collected magnetic, gravimetric, and seismic reflection data across multiple campaigns, totaling over 6,000 km of profiles. This research was part of the Italian National Research Program in Antarctica (PNRA), coordinated by ENEA.

Use Cases

• Modeling sub-seafloor geological structures based on seismic reflection profiles.
• Analyzing crustal density variations using the collected gravimetric data.
• Investigating magnetic anomalies in the Antarctic plate boundary regions.
• Studying the triple junction between the Antarctic, Pacific, and Indian Plates based on the survey's stated research focus.

Strengths

• Data collection spans three consecutive Antarctic summer campaigns from 1988-1991.
• Over 3,000 km of seismic profiles were collected in the first campaign alone.
• Detailed acquisition parameters are provided, including sample rate (4 ms), streamer length (3000 m), and air-gun specifications.

Limitations

• Last updated 1991-03-31; freshness should be verified.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file formats are unknown, which may limit suitability assessment.

Provenance

Source

Osservatorio Geofisico Sperimentale, under the Italian National Research Program in Antarctica (PNRA).

Collection Method

Marine geophysical survey using the Research Vessel OGS-Explora, equipped with seismic, gravimetric, and magnetometer sensors.

Time Range

Antarctic summers from 1988-1989 to 1990-1991.

Freshness

Last updated 1991-03-31 23:59:59.999000

Geography

South Pacific Ocean (Balleny Island area), Ross Sea, and Weddell Sea, Antarctica.