  We introduce a spherical version of the frustrated Blume-Emery-Griffiths
model and solve exactly the statics and the Langevin dynamics for zero
particle-particle coupling (K=0). In this case the model exhibits an
equilibrium transition from a disordered to a spin glass phase which is always
continuous for nonzero temperature. The same phase diagram results from the
study of the dynamics. Furthermore, we notice the existence of a nonequilibrium
time regime in a region of the disordered phase, characterized by aging as
occurs in the spin glass phase. Due to a finite equilibration time, the system
displays in this region the pattern of interrupted aging.
