Substorm expansion phase - last update: 4 September 1998, 1010 UT (RR)

The expansion phase starts the active part of the substorm process. It is related to the unloading of energy stored during the growth phase. Note that Mishin et al. (1997) have argued that the active phase could be divided into two separate parts. In this scenario the real expansion phase is preceded by a "phase of multiple onsets". During this period the processes are thought to be, primarily, driven, and only during the second part the unloading part of the substorm commences.


See also: