Solar P-mode characteristics associated with superactive-regions observed during Oct-Nov 2003

Abstract

Extensive flare activity was observed in super-active region NOAA 10486 during its disk passage of October 22-November 04, 2003. We have applied the ring diagram analysis technique to 3-D power spectra obtained for this active region in order to study any possible effect of these large flares on properties of the p-modes. The two other large, but relatively less flare productive active regions, viz., NOAA 10484, and NOAA 10488 observed during this period have also been included for comparison with NOAA 10486. In the flaring active region, we found mode power enhancement, and steep gradient in the meridional velocity, as compared to the quiet regions.