These dark blemishes on stars are key to understanding the interaction of strong magnetic fields and dynamic plasma.

Based on Singular Spectral Analysis (SSA) analysis of global earth surface temperature and solar activity (sunspots), Le Mouël et al. (2020, https://doi.org/10.1029/2019EA000671) suggest that the variability in Earth observed since 1850 is natural controlled by Sun. We cannot agree with their conclusions for several reasons: lack compelling results from Fourier spectra SSA estimates which are p...

Using Yohkoh SXT and Nobeyama 17 GHz data, we have studied the soft X{ray and microwave emission above several stable, large sunspots near central meridian passage. Our study connrms the well known fact that soft X{ray emission is depressed above sunspots. It also shows that the distribution of their soft X{ray intensity is not uniform; usually the darkest pixels are associated with the umbra o...