Magnetization relaxation measurements are carrie dout in the peak effect regime of supercon ducting V3Si crystal, using Quantum Design SQUID magnetometer. Relaxation in the increasing fiel dscan is logarithmic in time, consistent with the theory of flux creep. The relaxation on the decreasing field scan however exhibits athermal behavior which is predominantly governed by the flux avalanches triggered by the small external field perturbation experienced by the superconductor during measurement scan in an inhomogeneous field.