Auroral Occurrences in Norwegian Archives

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著者

    • OGUTI T.
    • Dept. of Earth and Planet. Phys., University of Tokyo

抄録

Occurrences of aurorae back to AD 1100, described in Norwegian archives are compared with the auroral zone estimated in the light of secular variations in the geomagnetic field. Descriptions of auroral occurrence are consistent with the estimated auroral zone back to the 13th Century. Beyond that time a discrepancy in timing between documents and estimates is found. Although auroral documents tell us that aurorae were more common in Greenland than in Norway from AD 1100 to 1250, estimated auroral zone suggests that the time interval when aurorae might be absent in Norway should be from AD 1250 to 1350. This discrepancy is probably due to uncertainty in age determination of either auroral documents or geomagnetic secular variations, particularly in the precession of the dipole axis, or both of them.

収録刊行物

  • Journal of geomagnetism and geoelectricity  

    Journal of geomagnetism and geoelectricity 47(4), 353-359, 1995-04 

    Society of Geomagnetism and Earth, Planetary and Space Sciences

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各種コード

  • NII論文ID(NAID)
    10002026724
  • NII書誌ID(NCID)
    AA00698879
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00221392
  • データ提供元
    CJP書誌  J-STAGE 
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