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Browsing by Author "Aleem, P. S. M"

Browsing by Author "Aleem, P. S. M"

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  • A detailed study of the geomagnetic storm of 8-10 March 1970 
    Balakrishnan, T. K; Varadarajan, R; Singh, S. B; Karunakaran, D; Aleem, P. S. M (National Institute of Science Communication And Information Resources, 1973-03)
    A comprehensive study of the geomagnetic oscillations during the storm of 8 – 10 March 1970 is made using data obtained from equatorial stations. The oscillation characteristics during the three main phases of the storm ...
  • Emergence of Twisted Magnetic Flux Related Sigmoidal Brightening 
    Sundararaman, K; Ramesh, K. B; Selvendran, R; Aleem, P. S. M; Hiremath, K. M (Indian Academy of Sciences, 2000-12)
  • Evershed velocities in bipolar sunspots 
    Sundararaman, K; Aleem, P. S. M; Thiagarajan, R (Astronomical Society of India, 1999)
    Spectra taken at the solar telescope-spectrograph, Kodaikanal, are analysed to find the sight-line velocity values in the regions between the opposite polarity sunspots. Velocities in opposite directions in the range 1 - ...
  • Improving the image quality at the calcium K and hydrozen spectroheliographs at the Kodaikanal Observatory 
    Singh, J; Aleem, P. S. M; Nagabhushana, B. S (Indian Institute of Astrophysics, 1988-01)
  • Solar variability in the CaII K during solar cycles 21 and 22 
    Sivaraman, K. R; Gupta, S. S; Kariyappa, R; Aleem, P. S. M; Sundararaman, K (Astronomical Society of India, 1993)
    We have monitored the sun in the light of the CaII K line and obtained the disc integrated profiles for the years 1974-91. From these profiles we have estimated the variability of the sun as a star as seen in the various ...
  • Transient activity in the loop prominence system of a flare active region 
    Bagare, S. P; Nagabhushana, B. S; Aleem, P. S. M (Astronomical Society of Indian, 1989-09)
    Solar limb observations of the activity in a loop prominence system associated with an active region were obtained on February 2, 1984. The activity was observed for a total duration of over seven hours of which the maximum ...
  • The variation of filament direction in a flaring region 
    Rausaria, R. R; Raman, K. S; Aleem, P. S. M; Singh, J (Kluwer Academic Publishers, 1993-07)
    We have analyzed the variations in shear angle over a time interval of 30 s during a flare on June 11, 1991, using Kodaikanal Observatory spectroheliogram and photoheliogram data, and assuming H-alpha filaments are a proxy ...

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