Observations of the H[alpha] hydrogen emission on Spitsbergen during the proton event of January 22, 2012

Abstract

The behavior of the H[alpha] hydrogen emission at Barentsburg observatory during precipitation of high-energy solar protons and sudden impulse (SI) on January 22, 2012, was studied. The emission intensity was determined with a spectrometer, which gives the meridian arc spectrum image. It has been shown that the H[alpha] emission luminosity onset coincides with SI and is caused by precipitation of solar wind protons through the cusp.[PUBLICATION ABSTRACT]