VLF study of Ionospheric properties during solar flares of varied intensity for a fixed propagation path

Deviations of subionospheric VLF signal amplitude due to solar flares of several energy classes have been computed for the VLF signal propagating along the VTX-Kolkata baseline. Using Long Wave Propagation Capability Code (LWPC), the variation of the effective height h' and steepness β parameters have been computed for X, M and C classes of solar flares. We compute the temporal variation of the electron number density.