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Fig. 1

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Panel a) dynamic ion energy spectrum of the AMI event in the energy range 0.08–2.2 MeV observed with SEPT-B/antiSun telescope on 2009-10-19. Panel b) and e) SWEA suprathermal electron pitch-angle distribution (PAD) at 194–314 eV. Panel c) IP magnetic field components in spherical coordinates (|B| , φ, and θ during the event. Panel d)–f) extended time interval from 16 to 22 October 2009. Panel d) solar wind speed, density and proton temperature variations. The vertical line indicates the event time. Panel e) the same as in panel b). Panel f) omnidirectional ion spectrogram showing the AMI event (arrow) in front of a weak particle intensity increase lasting a few days at energies below 300 keV.

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