ASTROPHYSICAL SEARCHES FOR EXOTIC PHENOMENA IN ULTRAHIGH ENERGY NEUTRINO-NUCLEON SCATTERING ∗

We investigate the potential of near–future neutrino telescopes like NESTOR for searches for exotic processes in ultrahigh energy neutrino–quark scattering. We consider signatures such as muon bundles and/or contained cascades from the nonperturbative production of multiple weak gauge bosons in the Standard Model, compositeness and leptoquark production.