54 citations · 621 across the 37 of their papers we have counts for
37 papers
Testing volume integrals of travel-time sensitivity kernels for flows
Michal Svanda, Daniel Chmurny
Context: Helioseismic inversions rely largely on sensitivity kernels, 3-D spatial functions describing how do the changes in the solar interior translate into the changes of helios…
Iterative construction of the optimal sunspot number series
Michal Švanda, Martina Pavelková, Jiří Dvořák +1
The relative number of sunspots represents the longest evidence describing the level of solar activity. As such, its use goes beyond solar physics, e.g. towards climate research. T…
Evolution and motions of magnetic fragments during the active region formation and decay: A statistical study
Michal Švanda, M. Sobotka, L. Mravcová +1
Context: The evolution of solar active regions is still not fully understood. The growth and decay of active regions have mostly been studied in case-by-case studies. Aims: Instead…
Plasma flows and sound-speed perturbations in the average supergranule
David Korda, Michal Švanda
Supergranules create a peak in the spatial spectrum of photospheric velocity features. They have some properties of convection cells but their origin is still being debated in the…
Observational study of chromospheric heating by acoustic waves
V. Abbasvand, M. Sobotka, M. Švanda +9
Aims. To investigate the role of acoustic and magneto-acoustic waves in heating the solar chromosphere, observations in strong chromospheric lines are analyzed by comparing the dep…
Immediate and delayed responses of power lines and transformers in the Czech electric power grid to geomagnetic storms
Michal Švanda, Didier Mourenas, Karla Žertová +1
Eruptive events of solar activity often trigger abrupt variations of the geomagnetic field. Through the induction of electric currents, human infrastructures are also affected, nam…