Fig. 6

Comparison of Core PC04 inclination and declination with those of nearby sites: off Shikoku at 32° 09’ N, 133° 54’ E (Ohno et al. 1993) and Lake Biwa at 35° 15’ N, 136° 03’ E (Hayashida et al. 2007). Red lines indicate the horizons of volcanic ashes identified commonly (K-Ah: Kikai-Akahoya ash, SUk: Sanbe-Ukinuno ash, AT: Aira-Tn ash). Red diamonds are the horizons of other ash layers identified only in the Lake Biwa core. Blue lines with GAD: inclinations calculated at individual sites based on the geocentric axial dipole field model. The age models of Ohno et al. (1993) and Hayashida et al. (2007) were recalculated with the methodology used for Core PC04