Studying the small-scale structure of a polarization jet during the April 20, 2018 geomagnetic storm
Journal Title: Solar-Terrestrial Physics - Year 2021, Vol 7, Issue 1
Abstract
In this work, we study the small-scale structure of a polarization jet in the subauroral region during the April 20, 2018 geomagnetic storm. We report measurement results of plasma parameters inside the polarization jet with a maximum sampling rate of up to 1 kHz, obtained with Langmuir probes installed on the NorSat-1 microsatellite. The study establishes the presence of temperature and electron density inhomogeneities inside the polarization jet with spatial dimensions of tens to hundreds of meters. The previously known features of the polarization jet evolution have been confirmed. We have also found that the distribution of the electron temperature inside the jet forms two separate peaks as the geomagnetic activity develops during the storm.
Authors and Affiliations
Sinevich A. A. , Chernyshov A. A. , Chugunin D. V. , Miloch W. J. , Mogilevsky M. M.
Keywords
Related Articles
- EP ID EP696866
- DOI 10.12737/stp-71202103
- Views 197
- Downloads 1
GEOMAGNETIC DISTURBANCES AT F1-LAYER HEIGHTS UNDER DIFFERENT SOLAR ACTIVITY CONDITIONS OVER NORILSK
We analyze the influence of geomagnetic disturbances on the electron density Ne at Norilsk ionospheric station (69° N; 88° E) at F1-layer heights (120–200 km). For the analysis, we have selected 25 moderate and weak geom...
SCIENTIFIC GOALS OF OPTICAL INSTRUMENTS OF THE NATIONAL HELIOGEOPHYSICAL COMPLEX
Studies of the upper atmosphere have to be performed using optical photometric and spectrometric means. Modern devices allow precise photometry of the glow of the night atmosphere — airglow — with high temporal spatial a...
SPATIAL STRUCTURE OF AZIMUTHALLY SMALL-SCALE MHD WAVES IN ONE-DIMENSIONALLY INHOMOGENEOUS FINITE PRESSURE PLASMA WITH CURVED FIELD LINES
We have studied propagation of hydromagnetic (MHD) waves in one-dimensionally inhomogeneous finite pressure plasma with curved field lines. Magnetic surfaces are considered to be concentric cylinders, where the cylinder’...
Ground-based observations of the VLF auroral hiss at Lovozero and Barentsburg observatories
The paper presents the results of the analysis of auroral hiss bursts, measured at Lovozero and Barentsburg observatories. These points are located on close geomagnetic meridians in the auroral and circumpolar zones. The...
GEOMAGNETIC INDICES ASY-H AND SYM-H AND THEIR RELATION TO INTERPLANETARY PARAMETERS
The dependences of the geomagnetic indices SYM-H and ASY-H on interplanetary parameters for the period from 1981 to 2015 according to their daily averages are studied. The study is carried out in two ways: the first — th...