Comment on “Incessant excitation of the Earth's free oscillations” by Nawa et al.

• Imanishi Yuichi

  Ocean Research Institute, University of Tokyo,

Bibliographic Information

Other Title

• Comment on ″Incessant excitations of the Earth′s free oscillations″by Nawa et al
• Comment on Incessant excitations of the

Abstract

The report of Nawa et al. (1998) that incessant excitation of the Earth's free oscillations was discovered in the low frequency spectra of the superconducting gravimeter at the Syowa station in Antarctica is reexamined. The mean spectra for Syowa are compared with those for Matsushiro, another superconducting gravimeter station in an extremely calm circumstance, hence showing a much lower noise level than Syowa. Although the spectra for Syowa have many peaks below 3 mHz corresponding to those present in the time-frequency diagram of Nawa et al., no similar peaks are found in the spectra for Matsushiro. This result suggests that the peaks below 3 mHz in the Syowa spectra are not real signals of the Earth's free oscillations.

Journal

• Earth, Planets and Space

  Earth, Planets and Space 50 (10), 883-885, 1998

  Society of Geomagnetism and Earth, Planetary and Space Sciences, The Seismological Society of Japan, The Volcanological Society of Japan , The Geodetic Society of Japan , The Japanese Society for Planetary Sciences

Keywords

• Space and Planetary Science
• Geology

Details

• CRID: 1390282681489197568
• NII Article ID: 10003736353
• NII Article ID: 130003955877
• NII Book ID: AA11211921
• DOI: 10.1186/bf03352182
• ISSN: 18805981
• ISSN: 13438832
• NDL BIB ID: 4614402
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4614402
• Web Site: https://link.springer.com/content/pdf/10.1186/BF03352182.pdf
• Web Site: https://link.springer.com/article/10.1186/BF03352182/fulltext.html
• Web Site: http://link.springer.com/content/pdf/10.1186/BF03352182
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed