Abstrakt
The solar wind speed transfers from supersonic to subsonic at the bow shock that separates two environments - the solar wind and magnetosheath. When the bow shock is quasi-parallel, the foreshock occupies a large portion of the upstream region.
The foreshock is a highly turbulent region filled with waves and reflected particles that interact each with another and create a large number of the foreshock structures (jets, plasmoids, SLAMS, foreshock bubbles etc.). These structures are carried by the solar wind flow, interact with the bow shock and penetrate downstream to the magnetosheath.
Depending on magnetic field and solar wind parameters, the structures can further grow through the magnetosheath and eventually they can influence the processes at the magnetopause and in the magnetosphere. We are using Magnetospheric Multiscale Spacecraft (MMS) mission to detect and investigate structures characterized by rapid changes of magnetic field and/or plasma parameters.
Simultaneous measurements of Cluster, THEMIS, GEOTAIL and MMS provide a nice opportunity for tracking of structure propagation. Based on our previous studies, we present a multi-spacecraft analysis of structures and discuss their evolution and interaction with the bow shock and the magnetopause.