Quiet-time suprathermal ions in the inner heliosphere during the rising phase of solar cycle 25

Solar Orbiter First Results (Nominal Mission Phase)

Open Access

Fig. 1.

Daily average EPD/SIS 226−320 keV/nucleon O intensities (filled red circles). The orange line is the threshold defining the semi-quiet time (see text). Right axis: heliospheric distance with five perihelia (blue line). The monthly sunspot number is shown by the dashed green line.

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