On the natural remanent magunetization of the tephra in diluvial deposits, Yamaguchi prefecture, Japan (II).

Since the previous report on the stratigraphy and magnetization of the Diluvial tephra deposits was published, the present authors have beenn able to expand the sampling area. In the present paper, the brief stratigraphy on the newly sampled area and the data of the natural remanent magnetization of the new specimens are reported. It seems that the amplitude of the secular change of the geomagnetic field, when the questioned tephra was deposited, might be larger than that of the last 2,000 years.