Physics of Auroral Phenomena

Abstract Cosmic Ray Group of Lebedev Physical Institute (LPI) has been carrying out long-term cosmic ray measurements in the atmosphere by radiosounding since 1957. . During quiet periods, the radiation in the atmosphere is due to galactic cosmic rays. The enhanced radiation level is observed at alt...

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Bibliographic Details
Main Authors: G A Bazilevskaya, V S Makhmutov, A K Svirzhevskaya, N S Svirzhevsky, Yu I Stozhkov, E V Vashenyuk
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 2002
Subjects:
Mirny
Antarc*
Antarctica
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1090.9328
http://pgia.ru:81/seminar/archive/2002/sun/bazilevsk.pdf
Description
Summary:Abstract Cosmic Ray Group of Lebedev Physical Institute (LPI) has been carrying out long-term cosmic ray measurements in the atmosphere by radiosounding since 1957. . During quiet periods, the radiation in the atmosphere is due to galactic cosmic rays. The enhanced radiation level is observed at altitudes above 20 km during solar proton events and electron precipitation events. Protons penetrate rather deep in the atmosphere while electrons are absorbed at altitudes ~70-100 km. However, the bremsstrahlung X-rays generated by electrons may be detected by the radiosounds at altitudes of ~20-35 km. Some powerful electron intrusions are observed during solar proton events mainly simultaneously with geomagnetic disturbances. This paper describes an electron precipitation event as observed at Mirny (Antarctica) during the solar proton event of September 24, 2001.

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