Energetic particle evolution during coronal mass ejection passage from 0.3 to 1 AU

Parker Solar Probe: Ushering a new frontier in space exploration

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Table 1

PSP and STEREO-A comparison.

	PSP	STEREO-A
CME arrival	2020-01-20 18:20	2020-01-24 01:30
CME departure	2020-021 07:30	2020-024 18:45
Fluence (80–150 keV)	4.48 × 10⁵	4.03 × 10⁶
Peak flux (80–150 keV)	2.28 × 10¹	1.08 × 10²
Spectral index at peak	−4.15	−3.97

Notes. Fluence is shown in units of cm⁻¹ sr⁻¹ MeV⁻¹. Peak flux is the maximum hourly flux in these periods and is in units of cm⁻¹ sr⁻¹ s⁻¹ MeV⁻¹.

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