The detailed detonation structure generated by multiple shocks on ram-accelerator projectiles is studied using highly resolved numerical stimulations. The simulations show that the detonation structure on the projectile consists of the following basic elements: nonreactive shocks, induction regions, deflagration waves, and detonation waves. The shape and location of these basic elements strongly depends on the projectile Mach number. In some cases, the induction region and the related detonation wave are primarily associated with one single shock. In other cases, the induction region extends across several shocks and the detonation structure is much more complex. These simulations also confirm that the detonations on the projectile are stable in a wide range of flow conditions and, therefore, can be used to generate the high pressure needed for projectile propulsion.