%0 Journal Article
%A Rastogi, R. G.,
%A Trivedi, Nalin Babulal,
%T Studies of sudden changes in H at equatorial stations in American zone
%B EOS, Transactions, American Geophysical Union
%X The storm sudden commencements (SC)and sudden impulses (SI)in H at equatorial stations in American Zone during IGY1IGC are discussed. The occurrence of SI is most frequent around midday whereas distribution of SC frequency with local time is uncertain. The amplitude of both SC and Slat the equatorial stations are enhanced during daylight hours. At any particular hour the amplitudes are enhanced only over a narrow zone over the magnetic equator. The enhancement is identical for SC an4 SI. It is suggested that the mechanism for equatorial enhancement for SC and SI is same.