  We explore the possibilty of detecting horizontal electromagnetic showers of
tau neutrinos from individual gamma ray bursts, in large scale detectors like
  HiRes and Telescope Array. We study the role of the parameters of a gamma ray
burst in determining the expected number of tau events from that burst. The
horizontal beam of tau leptons produce visible signals in the atmosphere. We
find that there is a slim chance of observing tau lepton appearances from GRBs
with Telescope Array. The number of signals is strongly dependent on the
Lorentz factor $\Gamma$, redshift $z$ of a GRB, energy emitted in muon
neutrinos and antineutrinos $E_{\nu,HE}$ and also on some other parameters of a
GRB. It is possible to understand neutrino oscillations in astrophysical
neutrinos and the mechanism or model of neutrino production inside a GRB by
detection or non detection of tau lepton signals from it.
