Open AccessSome Geomagnetic Disturbances At Alibag Observatory (India)& Allied Radio And Solar Effects (1937-1946).
Author(s) -
M. V. SIVARAMAKRISHNAN
Publication year - 1950
Publication title -
mausam
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 12
ISSN - 0252-9416
DOI - 10.54302/mausam.v1i3.4572
Subject(s) - solar flare , geomagnetic storm , ionosphere , meteorology , solar cycle 22 , sunspot , flare , observatory , atmospheric sciences , physics , earth's magnetic field , coronal mass ejection , astronomy , environmental science , solar wind , magnetic field , quantum mechanics
The paper presents an account of some magnetic disturbances associated with solar flares and radio fade out during the period 1937-1946. The ionospheric irregularities associated with four great magnetic storms recorded at the magnetic Observatory Alibag (Bombay) are discussed. On some occasions in intense solar flare is followed about a day later by a great magnetic storm, This occurs far more often than by chance. The presence of a , Crochet " in the magnetic records occurring simultaneously with a radio fade out and the appearance of a solar eruption or flare has been interpreted as showing that radiation from the flare traveling with the speed of light causes the " Crochet", while the magnetic storm which appears between 18 and 30 hours later is attributed to corpuscular radiation traveling at a speed of 1,000 to 2,000 miles/sec.
A list of sudden ionospheric disturbances or the Dellinger type from observations made in India during the period 1937-1946 has been collected and the principal features of the observations discussed.