Suratno Primary Author mixed material bibliography Bag. serial Jurnal sains dirgantara: Journal of aerospace sciences ind Indonesia

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Sumber artikel:Jurnal. Halaman: 113-131 The solar flare type II solar radio bursts and Coronal Mass Ejection (CME) are the serial phenomena of the sun which have a closed association. The accourence of type II solar radio bursts is triggered by passing of shock wave and is showing the ejection of plasma and magnetic fields. The shock wave or CME travelling toward the earth upper atmosphere can lead to the accourence of geomagnetic storm. Since the bursts propagation mecanism is by means of electromagnetic radiation and reaches the earth within 8 minutes the shock wafe or CME will reach the earth within 40 to80 hours or even it is exceending 5 days hence the type II bursts can be us as an early indicator information of the possibility incident of the geomagnetic strom. This investigation is carried out by analysing the trevel time of shock wave which is determined from the dynamic spectra of type II solar radio bursts and the onset time of the geomagnetic storm. This travel time then is compared to the difference between start time of type II bursts and the instant of minimum Dst (Disturbance storm time). This analysis is supported by the data of active region position on the solar disk as a source of bursts and the direction of interplanetary magnetic field. Solar flare, type II solar radio bursts, geomagnetic storm 629.13 JUR 1;2 UPT Perpustakaan UM Koleksi Bahan Pustaka Perpustakaan UM 2 -44995 2012-12-13 00:00:00 2012-12-13 00:00:00 machine generated