Context. A large number of small and short-lived EUV brightenings have been detected in
the quiet Sun (QS) over the past three years by the High Resolution Imager of the Extreme …

We investigate the spatial, temporal, and spectral properties of 10 microflares from AR12721
on 2018 September 9 and 10 observed in X-rays using the Nuclear Spectroscopic …

Context. Coronal dimmings are regions of reduced emission in the lower corona observed in
the wake of coronal mass ejections (CMEs), representing their footprints. Studying the …

Context. Solar extreme-ultraviolet (EUV) waves are propagating disturbances in the corona,
and they are usually accompanied with various solar eruptions, from large-scale coronal …

Abstract Coronal Holes (CHs) are regions of open magnetic-field lines, resulting in high-
speed solar wind. Accurate detection of CHs is vital for space-weather prediction. This paper …

Context. The millimeter and submillimeter radiation of solar flares is poorly understood.
Without spatial resolution, millimeter emission cannot be easily compared to flare emission …

We often find spectral signatures of chromospheric cold plasma ejections accompanied by
flares in a wide range of spatial scales in the solar and stellar atmospheres. However, the …

We begin here a series of papers examining the chromospheric and coronal properties of
solar active regions. This first paper describes an extensive data set of images from the …

Context. Solar jets are an important field of study, as they may contribute to the mass and
energy transfer from the lower to the upper atmosphere. Aims. We use the Interface Region …

The composition of the solar corona differs from that of the photosphere, with the plasma
thought to fractionate in the solar chromosphere according to the first ionization potential …