Basic study for renovation of archeomagnetism in Japan

对苏式窑自60年代以来已测定和贮存的样品进行了交变磁场退磁和重测。利用窑址样品的古强度研究也已开始，同时收集迄今已发表的古地磁数据，并将其汇编成一个新的数据库。我们编制了一个新的日本古地磁数据库，其中包括从旧数据库中收集的682个地点的日期和位置准确的数据以及一些发掘报告。在此基础上，建立了日本近2000年地磁场长期变化模型。

We applied alternating field demagnetization and re-measurement to the samples from the Sue-type kiln which had been already measured and stored since 1960s. Paleointensity study using the kiln sample was also started Archeomagnetic data so far published were collected and assembled as a new database simultaneously. We compiled a new archeomagnetic database of Japan including well-dated and well-located data from 682 sites collected from old database and some excavation reports. Based on the new database, we constructed a new geomagnetic secular variation model of Japan during the past 2000 years.