5. The formula for the Richter magnitude, M, of an earthquake is M = log- A where A is the A. amplitude of the earthquake and A, is the amplitude of a standard earthquake with magnitude of 0. In 2011, an earthquake occurred off the Pacific coast of the Tohoku region of Japan. This earthquake, which measured 9.0 on the Richter scale, is one of the five most powerful earthquakes in the world since modern record-keeping began in 1900. By comparison, one of the largest earthquakes to hit Alberta was a magnitude 4.7 earthquake. This earthquake occurred in 1984, on the border between British Columbia and Alberta, just north of Waterton Lakes National Park. Determine how many times larger in amplitude the Tohoku earthquake was compared to the Alberta quake. Answer to the nearest ten thousand