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Source movements associated with IPDP pulsations |
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| Affiliation: | 1. Geomatic Innovation Research Group (GnG), Faculty of Built Environment and Survey, Universiti Teknologi Malaysia, 81310, Johor Bahru, Malaysia;2. Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310, Johor Bahru, Malaysia;3. National Institute of Information and Communications Technology (NICT), Tokyo, Japan;4. Regional Technical Support, Asia Sales, Leica Geosystems ASIA, Singapore;5. Research Center for Space, National Research and Innovation Agency, Indonesia |
| Abstract: | Information on the temporal movement in the source of IPDP (intervals of pulsations of diminishing period) have been obtained by applying time delay location techniques to two events recorded at three stations in Southeast Australia. It is found that IPDP events propagate from coherent finite high latitude source regions to middle and low latitudes in the ionospheric duct. A westward drift in the source location in the early evening hours is observed as the IPDP frequency increases with time. This is attributed to the energization of ~50 keV substorm associated protons as they drift azimuthally and move to lower L-values under the influence of electric field convection. |
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