from 01.01.1975 to 01.01.2021
Irkutsk, Irkutsk region, Russian Federation
Moskva, Moscow, Russian Federation
Irkutsk, Russian Federation
Irkutsk, Russian Federation
Department of Space Science and Engineering, National Central University, Taiwan
Moscow, Russian Federation
Irkutsk, Russian Federation
In Earth’s orbit on June 28, 1999, there was a diamagnetic structure (DS) representing a filament with a uniquely high speed (about 900 km/s). We show that the filament is a part of the specific sporadic solar wind (SW) stream, which is characterized as a small interplanetary transient. We report the results of studies on the interaction between such a fast filament (DS) and Earth’s magnetosphere. Around noon hours at daytime cusp latitudes, we recorded a powerful aurora in the UV band (shock aurora), which rapidly spread to the west and east. Ground-based observations of geo-magnetic field variations, auroral absorption, and auro-ras on the midnight meridian have shown the develop-ment of a powerful substorm-like disturbance (SLD) (AE~1000 nT), whose origin is associated with the im-pact of the SW diamagnetic structure on the magneto-sphere. The geostationary satellite GOES-8, which was in the midnight sector of the outer quasi-capture region during SLD, recorded variations of the Bz and Bx geo-magnetic components corresponding to the dipolization process.
streamer, filament, diamagnetic structure; dayside auroras, shock aurora, substorm-like magnetospheric disturbance
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