A Possible Cause of Magnetic Anomalies on the Southern Martian Hemisphere*Supported by the National Natural Science Foundation of China Under Grant Nos 41374179 and 41421063

Download or read book A Possible Cause of Magnetic Anomalies on the Southern Martian Hemisphere*Supported by the National Natural Science Foundation of China Under Grant Nos 41374179 and 41421063 written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : From the topology of a synthetic aurora map, we propose a mechanism for the magnetic anomalies on the southern martian hemisphere, i.e., impacts by asteroids when the dynamo is active. The quasi concentric circles of aurora suggest that there are two-to-three convectional cells for each impact. The whole synthetic aurora is induced by three major impacts of asteroids. The east-west lineation features of crust magnetizations are due to the east-west trending locations of three impacts. The alternatively changed sign of crust magnetization originates from the alternatively changed flow direction on the tops of adjacent convectional cells.