  TeV or Super TeV neutrinos are expected to originate at the Gamma ray burster
(GRB) events in the universe. These neutrinos are expected to be produced from
the photo-meson interaction of the protons in the GRB environment. In the usual
picture, the protons in the GRB fireball undergo Fermi acceleration in the
ambient magnetic field of the GRB to very high energy. These protons then
interact with the MeV, KeV or meV photons and produce Delta particles, those
subsequently decay to produce very high energy neutrinos. In this note we focus
on the 100 TeV neutrinos produced in a GRB in the fireball model. We try to
estimate the production point of these multi TeV neutrinos from the center. The
strength of the Magnetic field there. Lastly but importantly modification in
the spectrum because of neutrino absorption in the ambient magnetic field. The
strength of the ambient magnetic field may change the neutrino spectrum.
