Speakers
Prof.
Georgios Anagnostopoulos
(Demokritos University of Thrace)Mr
Vassilios Vassiliadis
(Demokritos University of Thrace)
Description
The radiation belt electron precipitation (RBEP) into the topside ionosphere is a phenomenon which is known for several decades. However, the radiation belt source and loss mechanisms have not still well understood, including PBEP. Here we present the results of a systematic study of RBEP observations, as obtained from the satellite DEMETER (Detection of Electromagnetic Emissions Transmitted from Earthquake Regions) and the series of POES satellites, in comparison with variation in seismic activity. We found that this type of RBEP bursts present special characteristics in the inner region of the inner radiation belt before large (M>7 and in some cases M>5) earthquakes (EQs), as for instance characteristic flux-time profiles, energy spectrum, electron flux temporal evolution, longitude-latitude and local time some (2 - ~6) days before an EQ, and they are associated with broad band VLF activity. These PBEP events are most often associated with characteristic variations in ionospheric plasma, TEC and atmospheric conditions. The RBEP before EQs appears, not only as a burst, but as a increase of the normal electron background flux in large range of latitudes during magnetospheric storms. Recent results seem to suggest an increase of the normal electron background flux in the slot region in the presence of a geomagnetic storm and of strong seismic activity as well. Our results suggest that the EQ-related RBEP events and the earth based transmitter -related RBEP events can be well distinguished, and that EQ-related RBEP make the main contribution at middle latitudes.
Primary author
Prof.
Georgios Anagnostopoulos
(Demokritos University of Thrace)
Co-authors
Ms
Anna Karli
(Demokritos University of Thrace)
Mr
Georgios Barlas
(Demokritos University of Thrace)
Mr
Vassilios Vassiliadis
(Demokritos University of Thrace)
