Open Access

Regional orthogonal models of the geomagnetic field changes over the Far East

  • Irina A. Burdelnaya1,
  • Sergey V. Filippov1,
  • Vadim P. Golovkov1,
  • Satoshi Fujiwara2,
  • Tadashi Tanabe2,
  • Shujiro Nishi2,
  • Masaru Kaidzu2 and
  • Shigeru Matsuzaka2
Earth, Planets and Space201451:BF03352232

DOI: 10.1186/BF03352232

Received: 18 May 1998

Accepted: 2 March 1999

Published: 6 June 2014

Abstract

Two spatial-temporal models of the geomagnetic field secular variations in a time interval from 1970.0 to 1995.0 were constructed for the Far East region using the technique of regional modeling. First model covers a rectangular area, which includes Kamchatka, Sakhalin, the Kuril and Japanese Islands, the Ohotsk and the Japan Seas. Data from Russian, Japanese, and partially, Chinese observatories, and repeat stations were used for its construction. For filling of no data areas (the seas) the global models were used. Second model covers the area of the Japanese Islands and, partially, surrounding seas. Data from the Japanese magnetic observatories and first class repeat station network were utilized for its construction. We used natural orthogonal components method for obtaining temporal and spatial functions of the models. The accuracy of obtained models is much better than that of global models.