The 1967 Koyna and recent 1993 Khillari earthquakes triggered a rethinking on the seismic status of the Peninsular India which hitherto was thought to be a relatively stable land mass. Under such a changed seismotectonic scenario, evaluation of site dependent earthquake design parameters for important projects has become necessary. Earthquake design parameters for several projects have been recommended by the Department of Earthquake Engineering. This involves postulation of causative faults for estimation of Peak Ground Acceleration and proposing design response spectra and ground motion time history. A brief description of parameters adopted for project sites in Peninsular India is given. Except in Koyna region, no strong motion records are available in Peninsular India. Accelerograms from Koyna which are recorded in the period from 1968 to 1994 have been reanalysed and Attenuation relationship and shape of acceleration response spectra have been derived. The results have been compared with those from Himalayan region and it is seen that Koyna results are on the lower side.