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Behavior of a High Latitude Hydromagnetic Wave Phenomenon Observed at Conjugate Locations

机译:共轭位置观测到高纬度氢磁波现象的行为

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The study is a summary of the characteristics of the pc 1 geomagnetic field pulsation phenomenon in the 0.15 to 3.5 c/s frequency range with emphasis on the behavior at auroral latitudes. That the detected emissions are manifestations of resonant hydromagnetic wave propagation on the earth's field lines is evidenced by the preferred simultaneous occurrence at conjugate field locations. The occurrence times of high latitude emissions indicate that the excitation is on the sun side of the magnetosphere. The resonance frequency changes uniformly with local time. There seems to be coupling to other than field-guided propagation modes when the waves reach ionospheric altitudes. Large auroral associated absorption appreciably attenuates the signals. Present problems in understanding the pc 1 phenomenon are discussed. (Author)

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