Abstract
The IceCube Neutrino Observatory is a 1 km3 underground Cherenkov detector. The construction of the detector completed in December 2010 at the South Pole. Series of searches for high energy neutrino excesses above the conventional atmospheric neutrino and muon background models have already been performed using data from the partially completed detector. A hard energy spectrum of cosmic neutrinos from isotropically distributed astrophysical sources could form a detectable signal above the atmospheric background. Recent results from the searches for a diffuse flux of astrophysical neutrinos in data taken between April 2008 and May 2009 with the 40-string configuration of the IceCube detector are presented.
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