GEOL 1001 : Test 3 Notes
Document Summary
In picture 2 the rock is broken into joints: deformation, joints fractures that have no offset. They call it this because this is the wall a miner would be walking on: hanging wall (block above the fault). Earth shaking caused by a rapid release of energy. When rocks break, energy is released by friction. Vibrations cause motion, as when a bell is rung. 3. 5 million deaths in the last 2,000 years. Seismicity (earthquake activity) occurs due to: motion along a newly formed crustal fracture (fault) most common for earthquakes, motion on an existing fault most common for earthquakes, volcanic eruption, giant landslides, meteorite impacts, nuclear detonations. Hypocenter (focus) the spot within the earth where earthquake waves originate. Surface waves travel around the planet they cannot cross the entire planet. Body waves pass through the earth"s interior. M8. 9 annual energy released by all other earthquakes.
