Development of the detonation of a sub-Chandrasekhar mass white dwarf that explodes at the end of the crystallization phase. The meaning of the different curves is the same as in Fig. 7. In this model, the He detonated at an altitude of 70 km from the base of the envelope, and launched a second inwardly moving carbon detonation (see Tables 2 and 3), as can be seen already in the second panel. The carbon detonation processed all the matter down to the center of the white dwarf and, thereafter, sent a weak shock wave outwards (visible in the third panel at a Lagrangian mass of  ~0.5 M_⊙).