Vol. 61, Supp. 1, 2021

Geomagnetism and Aeronomy

Coronal Holes of Cycle 24 in Observations at the Solar Dynamics Observatory

O. A. Andreeva, V. I. Abramenko and V. M. Malashchuk p. S1 abstract

Analysis of the Physical Characteristics of the Polar Coronal Hole on the Sun in the Microwave Wavelength Range

O. A. Golubchina p. S9 abstract

Low Values of the Critical Decay Index of the Magnetic Field in Prominence Eruptions

B. P. Filippov p. S16 abstract

Increased Microwave Radiation Brightness as a Sign of Flare-Producing Active Regions Based on Observations of NOAA Active Region 12371

N. G. Peterova, N. A. Topchilo and E. A. Kurochkin p. S24 abstract

Solar Activity, Galactic Cosmic Ray Variations, and the Global Seismicity of the Earth

V. V. Khegai, A. D. Legen’ka, A. A. Abunin, M. A. Abunina, A. V. Belov and S. P. Gaidash p. S36 abstract

Frequency Modulation as a Cause of Additional Branches of the Gleissberg Cycle in Solar Activity

N. G. Ptitsyna and I. M. Demina p. S48 abstract

Evolution of Sunspot Magnetic Fields from the Measurements at the BST-2 Telescope of the Crimean Astronomical Observatory in Solar Cycle 24

Yu. T. Tsap, N. I. Kleeorin, Z. S. Akhtemov and V. M. Malashchuk p. S62 abstract

Manifestation of Solar Activity Effects in Lidar Observations of Stratospheric Aerosol

V. A. Korshunov and D. S. Zubachev p. S67 abstract

Solar-Activity Indices for the Ionosphere in Cycles 23 and 24: the Form of Cycles

M. G. Deminov, R. G. Deminov and E. V. Nepomnyashchaya p. S75 abstract

Variations of Electron Fluxes in the Outer Radiation Belt: Influence of High-Latitude Traps in the Dayside Cusps

A. P. Kropotkin p. S80 abstract

Polarization of Pc1 Geomagnetic Pulsations as an Indicator of the Position of Their Source

F. Z. Feygin, N. G. Kleimenova, L. M. Malysheva, Yu. G. Khabazin, L. I. Gromova and T. Raita p. S86 abstract

Discussion of the Problem of Ionospheric Precursors of Magnetic Storms

A. D. Danilov p. S94 abstract

Determination of the Enhancement in Electron Temperature in the Subauroral Ionosphere during Magnetic Storms on a Global Scale

I. A. Golikov, A. Yu. Gololobov, D. G. Baishev and G. A. Makarov p. S103 abstract

Spectral and Statistical Properties of the Doppler Frequency Shift during Substorms in the F2 Layer

N. P. Sergeenko p. S116 abstract

Statistical Correction of Mesoscale Variances of the Upper Atmospheric Temperature Based on Observations of the Night Hydroxyl Emission in Zvenigorod

A. A. Popov, N. M. Gavrilov, V. I. Perminov and N. N. Pertsev p. S127 abstract

Spitze Angle Changes during Rapid Geomagnetic Core Field Variation

A. G. Elias, M. Fagre, B. S. Zossi and H. Amit p. S134 abstract

Investigation of Success of AUSPOS and OPUS in Different Geomagnetic Activities and Short Session Durations

Sercan Bulbul p. S143 abstract

An Analysis of the Latest Super Geomagnetic Storm of the 23RD Solar Cycle (May 15, 2005, Dst: –247 nT)

F. Bascıftcı p. S156 abstract

Erratum to: Identification of Seismogenic Anomalies Induced by 11 April, 2012 Indonesian Earthquake (M = 8.5) at Indian Latitudes Using GPS-TEC and ULF/VLF Measurements

Devbrat Pundhir, Birbal Singh, Rajpal Singh and Sarita Sharma p. S167 abstract

Contents

Geomagnetism and Aeronomy