First paleosecular variation intensity curve for the las 4k years for Central Asia

Thanks to recent archaeomagnetic studies, it has been observed that the intensity of the magnetic field undergoes abrupt variations in different eras and regions of the planet. In particular, the Levantine Iron Age Anomaly (LIAA), first observed in Israel, has been studied. This phenomenon is characterised by reaching exceptionally high levels of intensity in a short period of time, followed by a rapid decline. Despite the importance of this anomaly, the geographical limit of the LIAA to the east is poorly constrained, with very few studies from Central Asia. The aim of this work is twofold: first, to provide the first high-quality archaeointensity data for the 2nd millennium BC in Central Asia. For this propose, 76 potteries sherds, collected from three different archaeological sites in Uzbekistan date between 2000 and 300 BC, were analysed by Thellier-Thellier method. The second objective is to present a first paleosecular variation (PSV) intensity curve for the last 4000 years, which allows a detailed understanding of the magnetic intensity behaviour in Central Asia. This work not only deepens our understanding of the LIAA and its magnetic implications, but also contributes to the global understanding of variations in the Earth's magnetic field over time.