6.2 Geometry of the observation
The Indian Ocean tsunami-induced TIPs were analyzed using the TIPs obtained at 870 thousand IPPs formed by all the GPS stations covering the Indian ocean from 40o E to 130oE and 50o S to 50o N (Fig. 3). Similarly, Nepal earthquake near-field CIP analysis was carried out at 950 thousand IPPs over the Himalayan region from 80o E to 92o E and 25o N to 31o N (Fig. 4).