Structure and Development of Solar Active Regions

Front Matter....Pages I-XVII
Welcome by the Hungarian Academy of Sciences....Pages 1-1
Preface and Introduction....Pages 3-9
Front Matter....Pages 11-11
Patterns of Active Region Magnetic Field Development....Pages 13-24
Origine des Régions Actives Solaires ‘Anormales’....Pages 25-32
Magnetic Classification of Active Regions....Pages 33-42
Development of Magnetic Fields in Active Regions....Pages 43-46
The Balance of Magnetic Fluxes in Active Regions....Pages 47-49
On the Birth of Some Proton-Flare Regions....Pages 50-55
Some Patterns in the Development of Centers of Solar Activity, 1962–66....Pages 56-63
Last Phases of Development of Active Regions....Pages 64-67
On Some Properties of the Velocity Field in a Developed Active Region....Pages 68-69
The Migration of Sunspot Activity Along Solar Meridians and Parallels....Pages 70-76
Chromospheric Explosions and Satellite Sunspots....Pages 77-84
Study of an Active Region of the Sun During Three Rotation Periods....Pages 85-91
Front Matter....Pages 93-93
Magnetohydrodynamics of an Active Region....Pages 95-107
Concentration of Magnetic Fields in the Deep Convection Zone....Pages 108-111
Oscillatory Modes of Energy Transport in Solar Magnetic Regions....Pages 112-125
On the Magnetic Structure of an Active Region....Pages 126-126
Oscillatory Convection in Strong Magnetic Fields and Origin of Active Regions....Pages 127-130
Quantitative Estimations of the Anomalous Plasma Diffusion in an Active Region....Pages 131-133
Front Matter....Pages 93-93
Étude Critique d’un Champ ‘Current-Free’ Dans L’atmosphère Solaire....Pages 134-141
Sunspots and Magnetohydrodynamic Flows....Pages 142-147
Front Matter....Pages 149-149
On the State of the Photosphere Before the Appearance of Sunspots....Pages 151-160
Correlations Between Brightness Fields and Magnetic Fields on the Sun....Pages 161-173
The Supergranular Pattern and the Stable Stages of Sunspot Groups....Pages 174-177
The Intensity, Velocity, and Magnetic Structure in and Around a Sunspot....Pages 178-186
Fine Structure of Brightness, Velocity and Magnetic Field in the Penumbra....Pages 187-192
Concerning the Development of the Evershed Motion in Sunspots....Pages 193-200
The Connection of Fine-Structure Photospheric Features in Active Regions with Magnetic Fields....Pages 201-201
On the Magnetic-Field Configuration in Sunspots....Pages 202-210
The Proper Motions of Sunspots and the Magnetic Field of Active Regions....Pages 211-213
Fluctuations of the Magnetic-Field Strength of Sunspots within One Day....Pages 214-214
On the Structure of the Magnetic Field of Sunspots....Pages 215-229
Magnetic and Doppler Oscillations in Active Regions....Pages 230-232
Preliminary Communication on the Short-Period Oscillations of Solar Magnetic Fields....Pages 233-235
Some Comments About Correlations Between Magnetic Field and Velocity, Magnetic Field and Line Intensity in the Undisturbed Photosphere....Pages 236-239
On Some Spectrographic Observations Related to the Structure with Height of Active Regions and Particularly Solar Flares....Pages 240-246
Chromospheric Heights in Active Regions....Pages 247-254
The Structure of the Lower Solar Chromosphere in Undisturbed and Active Regions....Pages 255-258
Problems in the Interpretation of Polarization Measurements in Active Regions....Pages 259-260
Front Matter....Pages 149-149
On the Magnetic-Field Structure Around Filaments....Pages 261-266
The Formation, Structure and Changes in Filaments in Active Regions....Pages 267-279
Prominences in Active Regions....Pages 280-281
The ‘Detwisted’ Prominence of September 12, 1966....Pages 282-286
Loop-Prominence Systems and Proton-Flare Active Regions....Pages 287-292
Bright Points (Moustaches) and Arch Filaments in Young Active Regions....Pages 293-298
Solar Active Regions in Mg II Light....Pages 299-303
Front Matter....Pages 305-305
Cooperative Study of Solar Active Regions....Pages 307-310
Flare Activity and Spotgroup Development....Pages 311-317
A Study of the Localization of Flares in Selected Active Regions....Pages 318-325
Evolution of Ca Plages of the CSSAR Active Regions....Pages 326-337
Correlation Between Ca Plages and Longitudinal Magnetic Fields of the CSSAR Active Regions....Pages 338-345
Évolution des Émissions Coronales au Cours de la vie d’un Centre Actif....Pages 346-355
Front Matter....Pages 357-357
Observation des Jets et Concentrations de la Couronne Au-Dessus des Régions Actives....Pages 359-378
Influence of Magnetic Fields on the Structure of the Solar Corona....Pages 379-384
Photographs of Coronal Streamers from a Rocket on May 9, 1967....Pages 385-388
New Aspects of the Role of Development and Structure of Solar Active Regions in the Arrangements of the Corona Based on its Geomagnetic Displays....Pages 389-389
Active Regions and the Interplanetary Magnetic Field....Pages 390-394
Extreme Ultraviolet Observations of Active Regions in the Solar Corona....Pages 395-402
Protons Associated with Centres of Solar Activity and their Propagation in Interplanetary Magnetic-Field Regions Co-Rotating with the Sun....Pages 403-403
Front Matter....Pages 357-357
The Solar Corona Above Active Regions: A Comparison of Extreme Ultraviolet Line Emission with Radio Emission....Pages 404-410
On Some Aspects of XUV Spectroheliograms....Pages 411-419
La Composante Lentement Variable des Rayons X Solaires en Relation Avec la Structure des Centres D’Activité....Pages 420-430
X-Radiation Studies of the Corona....Pages 431-431
Observations of Energetic X-Rays from Quiescent Solar Active Regions....Pages 432-438
X-Ray Picture of the Sun Taken with Fresnel Zone Plates....Pages 439-443
The Significance of the Polarization of Solar Short-Wavelength X-rays....Pages 444-448
Front Matter....Pages 449-449
Analysis of Some Solar Flares from Optical, X-ray, and Radio Observations....Pages 451-464
Interaction of Magnetic Fields and the Origin of Proton Flares....Pages 465-470
A Model of Solar Flares....Pages 471-479
The High-Energy Flare Plasma....Pages 480-482
The Occurrence and Possible Meaning of the ‘Nimbus’....Pages 483-484
Flare-Produced Coronal Waves....Pages 485-489
The Observation of 10–50 KeV Solar Flare X-rays by the OGO Satellites and their Correlation with Solar Radio and Energetic Particle Emission....Pages 490-509
Front Matter....Pages 511-511
Proton Flare Project....Pages 513-535
Observations of the Solar Proton Event of August 28, 1966....Pages 536-542
Sunspot Changes Following Proton Flares....Pages 543-550
Front Matter....Pages 551-551
Homology of Solar Radio Events....Pages 553-555
Some Results on Solar Activity at 408 MHz....Pages 556-564
Conditions of Acceleration of Solar Electrons, and Determination of the Magnetic Field in the High Corona from the Characteristics of a Type-IV Burst....Pages 565-569
Front Matter....Pages 551-551
Tendencies to Repeating of Type-IV m Bursts and their Relations to the Stage of Development of the Sunspot Group....Pages 570-574
Properties of Sources of the Slowly Varying Component of 2 cm Solar Radio Emission....Pages 575-580
Some Properties of the Sources of Slowly Varying Component and of Bursts at 612 Mc/s....Pages 581-584
Satellite Observations of Solar Radio Bursts....Pages 585-587
Comparison of 8-mm Solar Radio Features with Local Magnetic Fields and Chromospheric Features....Pages 588-593
Radio Emission of Spotgroups....Pages 594-597
Quelques Relations Entre Sursauts Radioélectriques Solaires sur Ondes Décimétriques et Caractères Morphologiques des Éruptions Chromosphériques Associées....Pages 598-599
The Effect of Compression and Expansion of Plasma on the Generation of Synchrotron Radiation....Pages 600-600
The Great Burst of May 23, 1967....Pages 601-601
The Development and Structure of an Active Region....Pages 602-608