Measurement of the energy spectrum of cosmic rays using the Pierre Auger Observatory

The flux of cosmic rays above 1018 eV has been measured with \nunprecedented precision at the Pierre Auger Observatory. Two analysis techniques have been used to extend the spectrum downwards from 3×1018 eV, with the lower energies being explored using a unique technique that exploits the hybrid strengths of the instrument. The spectral features are also presented.