A study of geomagnetic paleosecular variation in the Korean Peninsula

In order to better understand the paleosecular variation in the East Asia, a total of 166 archaeomagnetic directional data, which pass the reliability criteria, have been compiled from 101, 63 and 2 independent kilns, baked hearths and lava flows in South Korea, Southwest Japan and Northeast China, respectively. For the collected archaeomagnetic directional data, the standard archaeomagnetic data processing method and Fisher statistical method were applied. A new Korean PSV curve has been constructed for the past 2,000 years using the moving window technique using a cross-validation method. The KPSV curve shows a good agreement with the global geomagnetic field prediction model `ARCH3k.1'. Six possible archaeomagnetic jerks are proposed based on the sharp cusps on the KPSV curve. The KPSV data of this study would represent a new source of data for regional and global geomagnetic field modeling, as well as for archaeomagnetic dating in Korea.