CORRELATION OF HIGH-LATITUDE AND LOW-LATITUDE PI-2 MAGNETIC PULSATIONS OBSERVED AT 210-DEGREES MAGNETIC MERIDIAN CHAIN STATIONS

In order to clarify the correlation of high- and low-latitude Pi 2 mag netic pulsations, we have analyzed 1-s magnetic data from the Chokurda kh (Phi = 64.75 degrees, L = 5.50), Magadan (Phi = 53.70 degrees, L = 2.85), and Moshiri (Phi = 37.76 degrees, L = 1.60) stations along the 210 degrees magnetic meridian. The H-component Pi 2 amplitudes are of almost the same order in the plasmasphere. In the outside region of th e plasmapause the H-component amplitudes become roughly 1 order larger than those of in the plasmasphere. The D-component amplitudes, on the other hand, increase exponentially from lower to higher latitudes. At L = 1.60-2.85 the H- and D-component Pi 2 amplitudes show in-phase re lation. Between L = 2.85 and 5.50, the H components have a roughly out -of-phase relation, while the D components show an unclear relation. T hese observations suggest that Pi 2 pulsations consist of several diff erent modes in the structured magnetosphere.