def _get_site_amplification_term(self, C, vs30):
        """
        Returns the site amplification term on the basis of Eurocode 8
        site class
        """
        s_b, s_c, s_d = self._get_site_dummy_variables(vs30)
        return (C["sB"] * s_b) + (C["sC"] * s_c) + (C["sD"] * s_d)
Returns the site amplification term on the basis of Eurocode 8
        site class