Add to ORKGIt 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 the present work checks this assumption by using sunspot data and a further circumstance is also examined: the speed of the build-up of strong horizontal gradients. The empirical basis of the work is the SDD (SOHO/MDI-Debrecen sunspot Data) sunspot catalogue. It has been found that two types of variations can be signatures of pre-flare states: the speed of growth of magnetic field gradient and the rate of its fluctuation at the location of the flare onset. Key words: flares, magnetic configurations 1
Context.Solar flares are one of the most interesting phenomena of solar activity. Although many auth...
Abstract. In the present study, we consider six years data of spot groups that have well developed l...
Here, we test the weighted horizontal magnetic gradient ($WG_M$) as a flare precursor, introduced...
Several papers provide evidences that the most probable sites of flare onset are the regions of high...
Sunspots are regions of decreased brightness on the visible surface of the Sun (photosphere) that ar...
There is a wide range of eruptions in the solar atmosphere which contribute to space weather, includ...
Received xxx; accepted xxx Abstract. Four different methods are applied here to study the precursors...
We present a combined analysis of the applications of the weighted horizontal magnetic gradient (de...
The forecast method introduced by Korsós et al. is generalized from the horizontal magnetic gradient...
We propose to apply the weighted horizontal magnetic gradient (WG M ), introduced in Korsós et al.,...
We apply a novel pre-flare tracking of sunspot groups towards improving the estimation of flare onse...
We apply a novel pre-flare tracking of sunspot groups towards improving the estimation of flare onse...
Four different methods are applied here to study the precursors of flare activity in the Active Regi...
A summary of data on the occurrence of flares and the development of active regions, based on cinema...
In this paper, we study the short-term evolution of magnetic fields associated with five flares in δ...
Context.Solar flares are one of the most interesting phenomena of solar activity. Although many auth...
Abstract. In the present study, we consider six years data of spot groups that have well developed l...
Here, we test the weighted horizontal magnetic gradient ($WG_M$) as a flare precursor, introduced...
Several papers provide evidences that the most probable sites of flare onset are the regions of high...
Sunspots are regions of decreased brightness on the visible surface of the Sun (photosphere) that ar...
There is a wide range of eruptions in the solar atmosphere which contribute to space weather, includ...
Received xxx; accepted xxx Abstract. Four different methods are applied here to study the precursors...
We present a combined analysis of the applications of the weighted horizontal magnetic gradient (de...
The forecast method introduced by Korsós et al. is generalized from the horizontal magnetic gradient...
We propose to apply the weighted horizontal magnetic gradient (WG M ), introduced in Korsós et al.,...
We apply a novel pre-flare tracking of sunspot groups towards improving the estimation of flare onse...
We apply a novel pre-flare tracking of sunspot groups towards improving the estimation of flare onse...
Four different methods are applied here to study the precursors of flare activity in the Active Regi...
A summary of data on the occurrence of flares and the development of active regions, based on cinema...
In this paper, we study the short-term evolution of magnetic fields associated with five flares in δ...
Context.Solar flares are one of the most interesting phenomena of solar activity. Although many auth...
Abstract. In the present study, we consider six years data of spot groups that have well developed l...
Here, we test the weighted horizontal magnetic gradient ($WG_M$) as a flare precursor, introduced...