Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999geoji.136..784h&link_type=abstract
Geophysical Journal International, Volume 136, Issue 3, pp. 784-790.
Astronomy and Astrophysics
Astronomy
5
Geomagnetic Variation, Palaeomagnetism, Sediments
Scientific paper
A secular variation record of the geomagnetic field direction for the last 6.5 kyr has been obtained from the magnetization of sediment cores from Erhai Lake, southwest China. In order to make a comparison with this record, secular variation in east-central China was investigated by combining available magnetic field data from historical records and archaeomagnetic measurements since about 350 bc. The secular variation in Erhai Lake shows features consistent with the combined record, except for the oldest three observed declination swings in Sian from 720 to 900 ad. Many features of declination and inclination in China also occur in Japan. From 500 to 1000 ad, declination was westerly ranging from about -20° to -5° in Erhai Lake, east-central China, and Japan.
Hyodo Masayuki
Jian Liu Shi
Kashiwaya Kenji
Masuzawa Toshiyuki
Nomura Ryotaro
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