SEISMIC ACTIVITY IN THE SNOWY MOUNTAINS REGION AND ITS RELATIONSHIP TO GEOLOGICAL STRUCTURES
First-motion data for some of these tremors are given in Table III. Little information is available for any particular tremor, but by examining related groups of tremors some tentative solutions can be obtained. By this means it was possible to test the above hypothesis of secondary transcurrent faulting. The application of the hypothesis to the data is shown in Fig. 6. Arcs have been drawn indicating the possible variation in horizontal direction of each fault plane on this basis. The fault plane directions which best fit the data correspond to the directions given to AA' and BB' in Fig. 1.
On the hypothesis of secondary faulting it would be expected that most of the consequent movement would occur close to the original fault plane.
Fig. 6, Tentative fault plane solutions for Berridale after-shocks, testing the hypothesis of transcurrent faulting.
