Precipitation of high energy particles into the upper atmosphere at medium latitudes after magnetic storms

Details Precipitation of high energy particles into the upper atmosphere at medium latitudes after magnetic storms Precipitation of high energy particles into the upper atmosphere at medium latitudes after magnetic storms

Apr 1967

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967jatp...29..411l&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 29, no. 4, pp. 411-417

Physics

8

Scientific paper

Photodetachment processes in the lower parts of the D-layer at solar zenith angles 80° < [chi] < 100° allow the detection of an electron precipitation of low intensities, which is observed on a couple of days after periods when a storage of high energy particles in the Earth's environment is to be expected. By v.l.f.- and l.f.-measurements an additional ionisation is observed in medium latitudes during relatively quiet periods after certain magnetic storms. During high refilling periods of the outer radiation belt the electrons leaking out may be observed over periods up to more than 10 days. Occurring after most of the stronger storms the intensity of these after-effects has a clear dependence on season and latitude. Precipitation effects of this sort are not connected with PCA events, but show correlations with enhancements of geomagnetic pulsations. They disappear fully in latitudes below 50°, as proved by an European 1.f.-A3-absorption network. The occasions of such flux observations are highly variable over the sunspot cycle. Precipitation effects are often intensified during periods of small storms following a period where a storage has been possible. Aeronomic considerations allow an estimation of the precipitation flux.

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