Here is reported in situ observation of energetic electrons (∼100-500 keV) associated with magnetic reconnection in the solar wind by the ACE and Wind spacecraft. The properties of this magnetic cloud driving reconnection and the associated energetic electron acceleration problem are discussed. Further analyses indicate that the electric field acceleration and Fermi-type mechanism are two fundamental elements in the electron acceleration processes and the trapping effect of the specific magnetic field configuration maintains the acceleration status that increases the totally gained energy.

The source of the quasi-Carrington Rotation (qCR) magnetic variations is investigated by applying an analytical model.The ionospheric electron/plasma density is the primary factor inducing the qCR variations. qThe qCR variations could be used to probe the Martian interior's electrical conductivity structure to a depth of at least 700 km.