127 citations · 380 across the 13 of their papers we have counts for
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Different contributions to space weather and space climate from different big solar active regions
Jie Jiang, Qiao Song, Jing-Xiu Wang +1
The purpose of this paper is to show that large active regions (ARs) with different magnetic configurations have different contributions to short-term and long-term variations of t…
Comparative analysis of Debrecen sunspot catalogues
L. Győri, A. Ludmány, T. Baranyi
Sunspot area data are important for studying solar activity and its long term variations. At the Debrecen Heliophysical Observatory, we compiled three sunspot catalogues: the Debre…
Heritage of Konkoly's Solar Observations: the Debrecen Photoheliograph Programme and the Debrecen Sunspot Databases
T. Baranyi, L. Győri, A. Ludmány
The primary task of the Debrecen Heliophysical Observatory (DHO) was to produce the detailed and reliable photographic documentation of the solar photospheric activity since 1958.…
On-line Tools for Solar Data Compiled at the Debrecen Observatory and their Extensions with the Greenwich Sunspot Data
T. Baranyi, L. Győri, A. Ludmány
The primary task of the Debrecen Heliophysical Observatory (DHO) has been the most detailed, reliable, and precise documentation of the solar photospheric activity since 1958. This…
Statistical study of spatio-temporal distribution of precursor solar flares associated with major flares
N. Gyenge, I. Ballai, T. Baranyi
The aim of the present investigation is to study the spatio-temporal distribution of precursor flares during the 24-hour interval preceding M- and X-class major flares and the evol…
An alternative measure of solar activity from detailed sunspot datasets
Judit Muraközy, Tünde Baranyi, András Ludmány
The sunspot number is analyzed by using detailed sunspot data, including aspects of observability, sunspot sizes, and proper identification of sunspot groups as discrete entities o…
Active Longitude and Solar Flare Occurrences
N. Gyenge, A. Ludmány, T. Baranyi
The aim of the present work is to specify the spatio-temporal characteristics of flare activity observed by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) and Ge…
Comparison of Debrecen and Mount Wilson/Kodaikanal sunspot group tilt angles and the Joy's law
T. Baranyi
The study of active region tilt angles and their variations in different time scales plays an important role in revealing the subsurface dynamics of magnetic flux ropes and in unde…
Development and morphology of leading-following parts of sunspot groups
J. Muraközy, T. Baranyi, A. Ludmány
The detailed sunspot catalogues, the DPD and SDD allow to study the leading and following parts of sunspot groups separately. We examine the equilibrium distance of the two parts,…
Study of sunspot group morphological variations leading to flaring events
M. B. Korsos, T. Baranyi, A. Ludmany
It is widely assumed that the most probable sites of flare occurrences are the locations of high horizontal magnetic field gradients in the active regions. Instead of magnetograms…
Variations of Solar Non-axisymmetric Activity
N. Gyenge, T. Baranyi, A. Ludmány
The temporal behaviour of solar active longitudes has been examined by using two sunspot catalogues, the Greenwich Photoheliographic Results (GPR) and the Debrecen Photoheliographi…
Sunspot Group Development in High Resolution
J. Muraközy, T. Baranyi, A. Ludmány
The Solar and Heliospheric Obseratory/Michelson Doppler Imager--Debrecen Data (SDD) sunspot catalogue provides an opportunity to study the details and development of sunspot groups…