Inner belt and slot region electron lifetimes and energization rates based on AKEBONO statistics of whistler waves
Open Access
- 7 April 2014
- journal article
- research article
- Published by American Geophysical Union (AGU) in Journal of Geophysical Research: Space Physics
- Vol. 119 (4) , 2876-2893
Abstract
Global statistics of the amplitude distributions of hiss, lightning‐generated, and other whistler mode waves from terrestrial VLF transmitters have been obtained from the EXOS‐D (Akebono) satellite in the Earth's plasmasphere and fitted as functions of L and latitude for two geomagnetic activity ranges (Kp3). In particular, the present study focuses on the inner zone L∈[1.4,2] where reliable in situ measurements were lacking. Such statistics are critically needed for an accurate assessment of the role and relative dominance of each type of wave in the dynamics of the inner radiation belt. While VLF waves seem to propagate mainly in a ducted mode at L∼1.5–3 for Kp3). Hiss waves are generally the most intense in the inner belt, and lightning‐generated and hiss wave intensities increase with geomagnetic activity. Lightning‐generated wave amplitudes generally peak within 10° of the equator in the region LKpL∈[1.4,2].Keywords
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