33ND INTERNATIONAL COSMIC RAY CONFERENCE, RIO DE JANEIRO 2013 THE ASTROPARTICLE PHYSICS CONFERENCE The Longitudinal Properties of Solar Energetic Particle Events of 2012

Abstract: We study longitudinal properties of SEP distribution during the proton events of 2012 using data from SOHO, STEREO-A and B spacecrafts located in different points in the heliosphere. Totally in 2012 near the Earth were registered six proton events by pairs in January, March and May. The parent flares of the events on January 23 and 27, May 17 with coordinates of N28W36, N27W71 and N11W76 were well connected to the Earth by magnetic field lines and showed a promt proton arrival. Increasing rate and maximum values of proton intensity near the Earth were determined by duration and intensity of the particle injection into the magnetic field line. Much less and delayed proton enhancements observed by STEREO A and STEREO-B spacecrafts indicating effective cross-field propagation of SEP. The proton event of March 7, 2012 is the largest one recorded so far in the 24th solar cycle. Because its two parent solar flares were located at N17E27 and N22E12 the maximum of proton intensity was delayed and depressed near the Earth. The event of March 7, 2012 was better observed by STEREO-B than STEREO-A. Initial phase of these six proton events corresponds to our expectations basing on the East-West effect. During the late decay phase the resevoir effect was observed only under quite solar wind conditionson on 25-28 (140-144) days of 2012 by STEREO-B (SOHO) and disturbed conditions by SOHO (STEREO-A). The reservoir effect was not observed under disturbed conditions by SOHO and STEREO-A/B in March 2012