Recovering Inversion Lines from GONG Magnetograms and Implications for Space Weather Forecasting

Details Recovering Inversion Lines from GONG Magnetograms and Implications for Space Weather Forecasting Recovering Inversion Lines from GONG Magnetograms and Implications for Space Weather Forecasting

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh23b1545g&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SH23B-1545

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[7924] Space Weather / Forecasting

Scientific paper

Many space weather events are thought to be linked to solar active regions. A variety of techniques have been used in order to predict the occurrence of an event (usually x-ray flares) with a sunspot region. Typically sunspot classifications have been used as proxies for the magnetic field. With rapid cadence magnetograms, it is possible to recover significant information that would otherwise be difficult to obtain from sunspot classification only. In this paper, a simple technique is described for automatically recovering magnetic field properties from longitudinal GONG (Global Oscillation Network Group) magnetograms. Some of these properties such as maximum field strength, total flux and area are already routinely processed. Of interest is the automatic calculation of the inversion line length and complexity .The basic concept behind the algorithm is discussed and results from sample regions are reviewed. The relationships between inversion line complexity and occurrences of flares, solar particle events and coronal mass ejections will be reviewed.

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