  We consider the problem of the depinning of a weakly driven ($F\ll F_{c}$)
pancake vortex from a columnar defect in a Josephson-coupled superconductor,
where $F$ denotes the force acting on the vortex ($F_{c}$ is the critical
force).
  The dynamics of the vortex is supposed to be of the Hall type. The Euclidean
action $S_{Eucl}(T)$ is calculated in the entire temperature range; the result
is universal and does not depend on the detailed form of the pinning potential.
We show that the transition from quantum to classical behavior is second-order
like with the temperature $T_{c}$ of the transition scaling like $F^{{4}/{3}}.$
Special attention is paid to the regime of applicability of our results, in
particular, the influence of the large vortex mass appearing in the superclean
limit is discussed.
