The double shock pair is nearly symmetrical with respect to the central normal of the disturbance source in the heliospheric meridional plane, whereas it is asymmetrical in the heliospheric equatorial plane.
The double shock pair is nearly symmetrical with respect to the central normal of the disturbance source in the heliospheric meridional plane, whereas it is asymmetrical in the heliospheric equatorial plane.
该4个激波按离太阳由近及远依次为后向快激波、后向慢激波、前向慢激波和前向快激波。