This paper describes a study of 11 flaring sunspots, for which on flare days the relative positions of flares andsunspots have been determined from data provided by the Climax and the Mount Wilson Observatories. For eachspot group all data, including the magnetic polarities and field strengths, were projected to the center of the sun'sdisc and combined.The maps show that flaring...

Sunspot proper motions and flares of a super active region NOAA 5395, which was the biggest and the most flare-active region in the 22nd sunspot cycle, were analyzed in details. We measured sunspot proper motions by using the Hα − 5.0 Å images obtained with the 60-cm Domeless Solar Telescope (DST) at Hida Observatory, Kyoto University and found some peculiar vortex-like motions of small satelli...

Context. Complexity of an active region is related to its flare-productivity. Mount Wilson or McIntosh sunspot classifications measure such complexity but in a categorical way, and may therefore not use all the information present in the observations. Moreover, such categorical schemes hinder a systematic study of an active region’s evolution for example. Aims. We propose fine-scale quantitativ...

We examine existence and stability under learning of sunspot equilibria in a New Keynesian model incorporating inertia. Indeterminacy remains prevalent, stable sunspots abound, and inertia in IS and AS relations do not significantly impact the policy region containing sta-

I propose a theoretical mechanism that offers a possible explanation for the post-Great Recession stagnation experience observed in many industrialized countries. The theory is based on failures in the coordination of the beliefs of productive and innovative agents. In the model, an innovative sector determines endogenously the long-run growth rate of the economy, and research exhibits positive...

We consider a linear univariate rational expectations model, with a predetermined variable, and study existence and stability of solutions driven by an extraneous finite-state Markov process. We show that when the model is indeterminate there exists a new class of kstate dependent sunspot equilibria in addition to the k-state sunspot equilibria (k-SSEs) already known to exist in part of the ind...

Because of the lack of reliable sunspot observation, the quality of sunspot number series is poor in the late 18th century, leading to the abnormally long solar cycle (1784–1799) before the Dalton minimum. Using the newly recovered solar drawings by the 18–19th century observers Staudacher and Hamilton, we construct the solar butterfly diagram, i.e. the latitudinal distribution of sunspots in t...

In the present work, we introduce and explain a method of solution of the radiative transfer equation based on a thin cloud model. The efficiency of this method to retrieve dynamical chromospheric parameters from Stokes I profiles of Ca II 854.2 nm line showing spectral emission is investigated. The analyzed data were recorded with the Crisp Imaging Spectro-Polarimeter (CRISP) at Swedish 1-m So...

The objective of this work is to model the variable number cold fronts that affect Cuban territory in a winter season for long series data, establish if trend significant and see which are main statistics model, observe impact prediction using sunspots with help Objective Regressive ROR modeling. In work, per was modeled years from 1916-1917 seasons 2006-2007 seasons. There more moderate than a...