  The HAWC Gamma-Ray Observatory has reported the discovery of TeV gamma-ray
emission extending several degrees around the positions of Geminga and B0656+14
pulsars. Assuming these gamma rays are produced by inverse Compton scattering
off low-energy photons in electron halos around the pulsars, we determine the
diffusion of electrons and positrons in the local interstellar medium. We will
present the morphological and spectral studies of these two VHE gamma-ray
sources and the derived positron spectrum at Earth.
