Fig. 17

Point-spreading test. a Model perturbation of Gaussian distribution at a depth of 40 km. b Response H(m)δ m of (a). c Model perturbation at a depth of 10 km. d Response H(m)δ m of (c). \( H\left(\boldsymbol{m}\right)\approx \overset{\sim }{H}\left(\boldsymbol{m}\right) \) was assumed in this test