Multiscale analysis of active region evolution by Hewett, R, Gallagher, P, McAteer, R, Young, C, Ireland, J, Conlon, P, Maguire, K

“…Here, a continuous wavelet technique is developed, analyzed, and used to investigate the multiscale structure of an evolving active region using magnetograms obtained by the Michelson Doppler Imager (MDI) onboard the Solar and Heliospheric Observatory (SOHO). The multiscale structure was measured using a 2D continuous wavelet technique to extract the energy spectrum of the region over the time scale of 13 days. …”

Multifractal properties of evolving active regions by Conlon, P, Gallagher, P, McAteer, R, Ireland, J, Young, C, Kestener, P, Hewett, R, Maguire, K

“…Here we explore the multiscale properties of a number of evolving active regions using magnetograms from the Michelson Doppler Imager (MDI) on the Solar and Heliospheric Observatory (SOHO). The multifractal spectrum was obtained by using a modified box-counting method to study the relationship between magnetic-field multifractality and region evolution and activity. …”