Магнитосферные возмущения и результаты измерений в стратосфере за период проведения эксперимента «Самбо-79»/ Л. Л. Лазутин, В. А. Жавков, Т. А. Козелова [и др.]; Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т и др. – Препринт ПГИ 80-1.

during the bay and has the maximum at E , cz 50 ke¥. The oph softest spectrum is observed 10 min. after the 2-ray flux maximum. With the appearance of the electron precipitating region the electrojet expands southward to more low latit udes. After 2010 UT the electrojet diminishes in its north ward part (Hybachy and Loparskaya) and is located at Lovo- zero, Umba-Boyarskaya region to 2025 ОТ. After 2025 the electrojet moves southward and at 2040 UT its center is located on latitude of Boyarskaya. During the interval 2040- 2050 UT another burst of the electron precipitation is observed on the electrojet latitude. Eiometric absorption rises to 2 dB at Oulu. But this intensification of the pre-1 cipitation is not associated with the development of a sub- storm (Pig.6). The balloon was located northward from the precipitating region and no intensification of 1-ray emiss ion flux was registered. The precipitation of energetic electrons observed at the interval 1 957-2050 UT has typical features of the growth phase of a substorm /2/. The substona of a comparatively small power was observed since 2101 (Pig.3,6)- Pi2 pulsation train was registered at Borok and Lovozero. Aurora arc intensification is register ed The precipitation of energetic electrons intensified prior to the appearance of Pi2 train; the growth of ricunetr- ic absorption value began at 2054 UT at Oulu. The most power ful auroral intensification and poleward expansion began at 2101 UT. At the interval 2101-2122 a seria of bursts of X- ray was registered onboard the balloon. The energet ic spectrum softens at the maximum of each burst. According to the magnetic data the activity expands north-northeast ward until 2120 UT. At the interval 211U-2114 UT a north eastward development of £2—band is observed. Toward 2130 UT the disturbance intensification diminished in the northern part of the precipitating zone. Weak activity was still observed at the Bouthern stations (Boyarskaya,Voldozero). A small temporal intensification of the activity was re gistered by the photometers at Boyarskaya and Padun at 2134 UT. A powerful Pi2 pulsation train was registered at Borok. The major breakup registered by many stations Ъееяя 29