1. The Propagations of GZK (Tau) Neutrinos in Earth Standard and Non-Standard Physics

2. Rock Salt Various neutrino incident directions  Different distances of propagations inside the Earth before producing showers Downward ~ 10 km Horizontal ~ 100 km Earth skimming ~ 500 km ~ few km

3.  and  propagations inside the Earth  NC  CC Energy Loss  Decay CC  NC Propagation Distance With  =2.65 g/cm 3 New physics

4. GZK neutrino flux taken from R. Engel, D. Seckel and T. Stanev, 01 Up to L=500 km, GZK neutrino spectrum does not change much

5. Non-Standard Physics TeV scale gravity, KK excitations…

6. +N  micro black holes  hadrons  leptons J. L. Feng and A. D. Shapere 02  J. Alvarez-Muniz et al. 02 L. A. Anchordoqui et al. 03 4+n dimensions of space-time Take n=6, M D =2 TeV for simulations (done by C. H. Iong) ~10 particles

7. SalSA threshold 30 PeV with L  =250 m SalSA sensitivity to GZK flux begins here P. W. Gorham et al. astro-ph/0412128 5 10 30

8.  Distinguishable from standard-model physics by angular distributions.  For downward directions, flat spectrum measured for E beyond 10 9 GeV. For the horizontal direction, the measured spectrum is more or less the same as the original.