Earth Sciences 2220A/B Study Guide - Quiz Guide: Richter Magnitude Scale, Epicenter, Seismogram

• School: Western University
• Department: Earth Sciences
• Course: Earth Sciences 2220A/B
• Professor: Robert Shcherbakov

Document Summary

Questions: (5 marks) calculate the energy released by the synthetic event in activity a, in. E = 1. 58 x 1020 j: (20 marks) verify the calculation of the local magnitude from the website with a calculation by hand using the formula for ml: Ml = log10 a 2. 48 + 2. 76log10 , Ml (memphis) = log10 18 2. 48 + 2. 76log10 180. Ml (memphis) = 1. 255 2. 48 + 2. 76(2. 255) Ml (memphis) = 1. 255 2. 48 + 6. 224. Ml (birmingham) = log10 48 2. 48 + 2. 76log10 435. Ml (birmingham) = 1. 681 2. 48 + 2. 76(2. 638) Ml (birmingham) = 1. 681 2. 48 + 7. 282. Ml (indianapolis) = log10 54 2. 48 + 2. 76log10 490. Ml (indianapolis) = 1. 732 2. 48 + 2. 76(2. 690) Ml (indianapolis) = 1. 732 2. 48 + 7. 425. Ml (average) = (4. 9998 + 6. 483 + 6. 677) / 3. Ml (average) = 6. 0: (10 marks) determine how frequently an earthquake, of the magnitude you found for your event in activity a, occurs in southern california per year.