الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The geomagnetic pulsations have been intensively studied recently because they are a profitable way to study phenomena and conditions in the ionosphere and magnetosphere. These pulsations are useful in the diagnosis of the near Earth plasmas, fields and their interactions. To achieve these goals, the temporal and spatial structureof PC5 pulsations are investigated using data from the Misallat, and Abu-Simble magnetic observatories in Egypt and from other four magnetic observatories: Addis Ababa (AAE),Tamanrasset (TAM), L’Aquila (AQU) and Belsk (BEL) from different countries located at high, mid, and low latitudes and listed on the INTERMAGNET.Correlation between the PC5 waves during day and night times in the quite dayswas carried out.