Acoustic waves are generated by the convective motions in the solar convection zone. When propagating upwards into the chromosphere they reach the height where the sound speed equals the Alfvén speed and they undergo mode conversion, refraction and reflection. We use numerical simulations to study these processes in realistic configurations where the wavelength of the waves is similar to the le...

High-speed downflows have been observed in the solar transition region (TR) and lower corona for many decades. Despite their abundance, it has hard to find signatures of such chromosphere. In this work, we target an enhanced network that shows ample occurrences rapid spicular \halpha\ spectral line could potentially be linked high-speed TR downflowing counterparts. We used $k$-means algorithm c...

Abstract David Kuridze, Lyndsay Fletcher and Hugh Hudson report on the RAS Specialist Discussion Meeting ‘3D Structure of Flare Chromosphere’.