The purpose of this note is to present a construction of an
infinite family of symplectic tori Tp,q representing an arbitrary
multiple q[F] of the homology class [F] of the fiber of an
elliptic surface E(n), for n ≥ 3, such that, for i ≠ j, there is no
orientation-preserving diffeomorphism between (E(n), T(i,q))
and (E(n), T(i,q)). In particular, these tori are mutually nonisotopic.
This complements previous results of Fintushel and
Stern in [FS2], showing in particular the existence of such
phenomenon for a primitive class.