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Solar magnetic feature detection and tracking for space weather monitoring

Bloomfield, D. S.; Gallagher, P. T.; McAteer, R. T. J. +1 more

We present an automated system for detecting, tracking, and cataloging emerging active regions throughout their evolution and decay using SOHO Michelson Doppler Interferometer (MDI) magnetograms. The SolarMonitor Active Region Tracking (SMART) algorithm relies on consecutive image differencing to remove both quiet-Sun and transient magnetic featur…

Coronal mass ejection detection using wavelets, curvelets and ridgelets: Applications for space weather monitoring

Gallagher, P. T.; Young, C. A.; McAteer, R. T. J. +1 more

Coronal mass ejections (CMEs) are large-scale eruptions of plasma and magnetic field that can produce adverse space weather at Earth and other locations in the Heliosphere. Due to the intrinsic multiscale nature of features in coronagraph images, wavelet and multiscale image processing techniques are well suited to enhancing the visibility of CMEs…

Actors of the main activity in large complex centres during the 23 solar cycle maximum

Mandrini, C. H.; Schmieder, B.; Molodij, G. +10 more

During the maximum of Solar Cycle 23, large active regions had a long life, spanning several solar rotations, and produced large numbers of X-class flares and CMEs, some of them associated to magnetic clouds (MCs). This is the case for the Halloween active regions in 2003. The most geoeffective MC of the cycle (Dst = -457) had its source during th…

Representation of solar features in 3D for creating visual solar catalogues

Colak, Tufan; Qahwaji, Rami; Ipson, Stan +1 more

In this study a method for 3D representation of active regions and sunspots that are detected from Solar and Heliospheric Observatory/Michelson Doppler Imager magnetogram and continuum images is provided. This is our first attempt to create a visual solar catalogue. Because of the difficulty of providing a full description of data in text based ca…