Characteristics of the Matuyama‐Brunhes Magnetic Field Reversal Based on a Global Data Compilation

Magnetic field reversals are irregular events in Earth's history when the geomagnetic changes its polarity. Reversals recorded by spot and continuous remanent magnetization data collected from lava flows marine sediments, respectively. The latest reversal, Matuyama-Brunhes reversal (MBR), is better covered paleomagnetic than prior reversals, hence providing an opportunity to understand physical mechanisms. Despite quantity of data, a full understanding MBR still lacking. evolution time space explored this work compiling global set both sediments volcanic rocks, which encompass period 900–700 ka. After careful evaluation dating quality, regional stacks virtual axial dipole moment (VADM), pole (VGP), paleosecular variation index (Pi) constructed sediment records using bootstrap resampling. Individual VADMs VGPs calculated lavas compared these stacks. Four phases full-vector instability observed over 800–770 first three phases, at 800–785 ka, reflect rapid weakening coupled with low VGP latitude, after returned reverse polarity Matuyama chron. fourth phase, lasting 780 770 process completed, such that entered Brunhes normal state. These findings point complex ∼30 Kyr, ending ∼770