An interdisciplinary study of geomagnetic storms
is currently underway at the CSR, LLN, in collaboration with the
Intitute of Nuclear Physics at the Moscow State University, the
LPCE / CNRS, Orleans, France.
The objective is to examine the dynamical VLF wave spectra observed
in the inner magnetosphere by the WHISPER experiment operating
on board of the four CLUSTER satellites during a set of geomagnetic
storms events when energetic electron flux measurement are available
from the Russian CORONAS-F mission. The evolutions of the spatial
and spectral distribution in the outer radiation belts will be
compared with the simultaneous evolution of the spatial and spectral
distribution of the energetic electrons injected, accelerated and
trapped in the earth's magnetosphere. This study is expected to
improve our understanding of the role played by VLF waves in the
acceleration and scattering of electrons in the outer radiation
belt and slot region.