A Perspective on Substorm Dynamics Using 10 Years of Auroral Kilometric Radiation Observations From Wind.

ABSTRACT: We study 10 years (1995-2004 inclusive) of auroral kilometric radiation (AKR) radio emission data from the Wind spacecraft to examine the link between AKR and terrestrial substorms. We use substorm lists based on parameters including ground magnetometer signatures and geosynchronous particle injections as a basis for superposed epoch analyses of the AKR data. The results for each list show a similar, clear response of the AKR power around substorm onset. For nearly all event lists, the average response shows that the AKR power begins to increase around 20 min prior to expansion phase onset, as defined by the respective lists. The analysis of the spectral parameters of AKR bursts show that this increase in power is due to an extension of the source region to higher altitudes, which also pre

SUBMITTER: Waters JE 

PROVIDER: S-EPMC9540659 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature