2010/12/16 by G. Anagnostopoulos, Georgios C. Anagnostopoulos, Anagnostopoulos, G. +5 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Earthquake Detection and Analysis #FOS: Physical sciences #Geological and Geochemical Analysis #Geophysics (physics.geo-ph) #Space Physics (physics.space-ph) #earthquake and tectonic studies #physics.geo-ph #physics.space-ph
paper · pdf · doi:10.48550/arxiv.1012.3588
23 pages, 17 figures
arxiv created 2010/12/16 · openalex publication_date 2010/12/16 · arxiv updated 2010/12/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this article we present examples of a wider study of space-time correlation of electron precipitation event of the Van Allen belts with the position and time of occurrence of strong (M>6.5) earthquakes. The study is based on the analysis of observations of electron bursts (EBs) with energies 70 - 2350 keV at middle geographic latitudes, which were detected by DEMETER satellite (at an altitude of ~700 km). The EBs show a relative peak-to-background increase usually < 100, they have a time duration ~0.5 - 3 min, energy spectrum with peaks moving in higher energies as the satellite moves towards the equator, and highest energy limit <~500 keV. The EBs are observed in the presence of VLF waves. The flux-time profile of the EBs varies in East Asia and Mediterranean Sea at the similar geographic latitudes, due to the differentiation of the magnitude of the earth's magnetic field. The most important result of our study is the characteristic temporal variation of electron precipitation variation which begins with incremental rate several days / a few weeks before major earthquakes, then presents a maximum, and finally become weaker, with a minimun or a pause of the electron precipitation some hours before the onset of the earthquake.