MID-LATITUDE AURORA IN SOLAR CYCLES 23–24 FROM OBSERVATIONS IN THE SOUTH OF EASTERN SIBERIA
Journal Title: Solar-Terrestrial Physics - Year 2019, Vol 5, Issue 4
Abstract
The paper presents observations of mid-latitude aurora (MA) in the south of Eastern Siberia in solar cycles 23–24. Spectral composition and dominant emissions of MA, daily distribution of MA detection probability, dependence on the level of geomagnetic activity, and classification according to types of aurora are discussed. A close relationship is shown between the intensity of dominant emission at 630.0 nm and the Dst index during magnetic storms (MSs). It is pointed out that the most intense MA are recorded during MS main phases. The MA detected on November 20, 2003 can enlarge the list of great aurora. For the severe MSs (Dstmin< –200 nT) of March 24, 1991, April 6, 2000, October 30 and November 20, 2003, March 17, 2015, the observed dynamics of 557.7 and 630.0 nm auroral emissions is presented. Mechanisms of emission excitation during geomagnetic storms and a possible connection with magnetospheric structures are discussed.
Authors and Affiliations
Mikhalev A. V.
Keywords
Related Articles
- EP ID EP702101
- DOI 10.12737/stp-54201909
- Views 108
- Downloads 0
WAVE ACTIVITY OF THE MESOSPHERE IN THE PLANETARY WAVE RANGE ACCORDING TO OH (3-1) EMISSION OBSERVATIONS AT MAIMAGA AND TIKSI STATIONS FOR 2015–2020
The article compares the interannual variability of the atmosphere at the OH glow height, which can be associated with planetary wave propagation, at stations spaced in latitude. As a characteristic reflecting planetary...
Spectral analysis of IAR oscillations to determine the value and variability of the peak electron density NmF2
This methodical paper explores the possibility of estimating the peak electron density of the F2-region of the ionosphere (NmF2) under different conditions, using data on the frequency of spectral bands (harmonics) of th...
ALFVÉN WAVES IN THE MAGNETOSPHERE GENERATED BY SHOCK WAVE/PLASMAPAUSE INTERACTION
We study Alfvén waves generated in the magnetosphere during the passage of an interplanetary shock wave. After shock wave passage, the oscillations with typical Alfvén wave dispersion have been detected in spacecraft obs...
MEASUREMENT OF SIBERIAN RADIOHELIOGRAPH CABLE DELAYS
To achieve the maximum dynamic range of solar radio images obtained using aperture synthesis in relatively wide frequency bands 0.1−0.5 % of the operating frequency, it is necessary to compensate the signal propagation d...
CLASSIFICATION OF MAGNETOSPHERIC RESPONSES TO INTERACTION WITH DIAMAGNETIC STRUCTURES OF SLOW SOLAR WIND
We propose a possible classification of the responses of the magnetosphere to the interaction with diamagnetic structures (DS), which form the basis of the slow solar wind. The main determinants of the classification are...