Contents

Geomagnetism and Aeronomy

Vol. 60, No. 6, 2020

Cyclic Variations, Magnetic Morphology, and Complexity of Active Regions in Solar Cycles 23 and 24

A. V. Zhukova, D. D. Sokoloff, V. I. Abramenko and A. I. Khlystova p. 673  abstract

Possibility of Diagnostics of the Beginning of Solar Cycle 25 Based on Its Precursors at Mid-Heliolatitudes

A. A. Golovko p. 684  abstract

Ground-based Instrument for the Study of Cosmic Ray Variation in Nur-Sultan

E. A. Tulekov, V. S. Makhmutov, G. A. Bazilevskaya, Yu. I. Stozhkov, A. K. Morzabaev, M. V. Philippov, V. I. Erkhov and A. S. Dyusembekova p. 693  abstract

Prolonged, Weak C1.2 Flares: A Source of Protons and Electrons

I. Yu. Grigor’eva, A. B. Struminskii and A. N. Shakhovskaya p. 699  abstract

Behavior of He++ Ions at the Front of an Interplanetary Shock

O. V. Sapunova, N. L. Borodkova, G. N. Zastenker and Yu. I. Yermolaev p. 708  abstract

Differences in the Dynamics of the Asymmetrical Part of the Magnetic Disturbance during the Periods of Magnetic Storms Induced by Different Interplanetary Sources

L. A. Dremukhina, Yu. I. Yermolaev and I. G. Lodkina p. 714  abstract

Ion Pressure in Different Regions of the Dayside Auroral Precipitation

V. G. Vorobjev, O. I. Yagodkina and E. E. Antonova p. 727  abstract

Ground-Based and Satellite Observations of the SAR Arc in the MLT Evening Sector at the Beginning of the Magnetic Storm on March 17, 2015

I. B. Ievenko and S. G. Parnikov p. 737  abstract

Reconstruction of the Parameters of the Lower Midlatitude Ionosphere in M- and X-Class Solar Flares

B. G. Gavrilov, V. M. Ermak, A. N. Lyakhov, Yu. V. Poklad, V. A. Rybakov and I. A. Ryakhovsky p. 747  abstract

Influence of the Ionosphere on the Parameters of the GPS Navigation Signals during a Geomagnetic Substorm

V. I. Zakharov, A. A. Chernyshov, W. Miloch and Y. Jin p. 754  abstract

Implementation of Ionospheric Generators in the Numerical Model of the Global Electric Circuit

F. A. Kuterin and N. N. Slyunyaev p. 768  abstract

Luminescence of Lyman–Birge–Hopfield Bands of N2 in the Earth’s Atmosphere during the Precipitation of High-Energy Electrons

A. S. Kirillov and V. B. Belakhovsky p. 781  abstract

Unitary Variation in the Seismic Regime of the Earth: Carnegie-Curve Matching

S. A. Pulinets and G. Ya. Khachikyan p. 787  abstract

Paleointensity Bursts in the Geomagnetic Field History

A. Yu. Kurazhkovskii, N. A. Kurazhkovskaya and B. I. Klain p. 793  abstract