A review of the available literature for the 1897 Assam, 1905 Kangra, 1934 Bihar-Nepal and 1950 Assam earthquakes permits a rupture model for large (magnitude greater than 8) earthquakes of the Himalayan Collision Zone to be proposed within the framework of the plate tectonics paradigm. The rupture responsible for such an earthquake should occur on an entirely concealed fault surface with a gentle dip in the northerly direction normal to the local strike of the Himalaya. The rupture should occur mainly under the Lesser Himalaya with its southern limit close to the surface trace of the Main Boundary Thrust except in the Shillong Plateau region where it may be close to the southern of edge of the plateau. Its length parallel to the strike of the Himalaya should be about 300 km and the rupture propagation should be predominantly fr om the eastern to the western end. The sense of relative slip across the fault surface should be of the thrust type mainly.