Abstract
The solar proton events of September 6 and 10, 2017, are studied using means developed earlier by the author. The results are compared to those obtained for events of January 27 and May 17, 2012. The start of microwave emission at 15.4 GHz is chosen as zero time for each parent solar flare. Intensities of protons (GOES) and electrons (SOHO EPHIN) are considered, relative to these zero times, along with the count rate of the anti-coincidence system of the spectrometer on board the INTEGRAL space platform (ACS SPI). The ACS SPI is used as a detector of hard X-ray (HXR) emission and relativistic protons. Electrons accelerated in the impulsive first phase of flares on September 6 and 10, 2017, were detected before protons. Protons and electrons, apparently accelerated in the second phase of the flare and later, are detected simultaneously in all of the events.
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