3.2. VGP’s and Pole Migration
The virtual geomagnetic pole (VGP) shows the position of the geomagnetic
paleopole (Lanza and Meloni, 2006). VGP’s latitudes from this data set
show fluctuations in the Matuyama section which are similar with the
data from Yamazaki and Oda (2001) (Fig. 7a, b). These values indicate
90o change from Matuyama to Brunhes transition as a
result of pole migration (Fig. 7a). 75° change in VGP values at 11.8 cm
depth (Fig. 7a) shows the precursor of the reversal according to Valet
et al. (2012) (Fig. 7c). In addition, we plotted the VGP path for
Matuyama, Brunhes, and transition sections using VGP latitudes and
longitudes based on characteristic remanent magnetization (ChRM)
directions detected in our samples (Fig. 8). VGP locations for the
Matuyama section are in the southern hemisphere (Fig. 8). During the
transition from reversed to normal polarity, the magnetic pole migrates
from southern to northern hemisphere (Fig. 8). After the geomagnetic
transition, paleopoles fluctuate around the geographic north pole (Fig.
8). This VGP path of pole migration during the transition from the
southern to northern hemisphere compares well with the Matuyama-Brunhes
transition found by Okada et al. (2017) recorded in marine sediments
near Japan (Fig. 8).