We usually do two or three stuffblock tests since once the pit wall is excavated it is relatively simple to isolate a number of columns of snow for testing. Consistent results between tests obviously give us greater confidence in our interpretation. Then the pit wall is smoothed over and we conduct a rutschblock result. Again, we look for consistency between our expected results and the results of the two stability tests. Advantages and disadvantages of the rutschblock and stuffblock tests.
Check marks indicate the advantage of that particular test.
By recognizing the limitations of each test we feel we can capitalize on the advantages of both tests. May underestimate deep slab instabilities in some cases May better estimate deep slab instabilities Even when using both tests, interpretation requires experience and is not easy. Shear quality assessment has given us one more way to interpret test results. It has also allowed us to better communicate results between each other and to explain results to students. As in several areas of avalanche forecasting, there is no clear-cut guideline for how much emphasis should be placed on shear quality.