Preliminary report of electromagnetic soundings on East Ongul Island, Antarctica

• Main Authors: Aoyama,Yuichi, Nogi,Yoshifumi, Kaminuma,Katsutada, Nagao,Toshiyasu
• Format: Report
• Language: English
• Published: The Graduate University for Advanced Studies/National Institute of Polar Research/National Institute of Polar Research/Earthquake Prediction Research Center, Tokai University 1998
• Subjects: telluric field; geomagnetic field; electrical anisotropy; electromagnetic sounding; East Antarctica; Syowa Station; Ongul; Ongul Island; East Ongul Island; Antarc*; Antarctica; Polar geoscience
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3018; http://id.nii.ac.jp/1291/00003018/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3018&item_no=1&attribute_id=18&file_no=1

Observations of the telluric field were carried out at Syowa Station (69°S, 39°35'E) in Lutzow Holm Bay, East Antarctica from May 22, 1995 to January 31, 1996. Telluric fields at Syowa Station have strong anisotropy which varies with frequency. Major axis of electrical variations at high frequency (0.1 Hz-0.5Hz) trend almost N60°E and those at low frequency (1mHz-10mHz) have a N135°E trending major axis. These results suggest that electrical anisotropy exists beneath Syowa Station and the trend changes from N60°E to N135°E with depth.