EESA06H3 Chapter Notes - Chapter 3: Oceanic Crust, Richter Magnitude Scale, Mercalli Intensity Scale
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= waves of energy produced by an earthquake. = the break between the 2 rock masses as they move past each other progressively stored elastic strain energy in rocks, causing movement along a fault. Eventually the stored energy in the rock exceeds the breaking strength, rock breaks causing and earthquake: brittle behaviour of breaking rock is only in rock near earth"s surface. Rocks at depth are subjective to increase temperature and pressure = less brittle. Are seismic waves that ravel through the earth"s interior, spreading outward from the focus. Seismic waves that travel on earth"s surface away from the epicenter (like water moving. Fig 3. 5 page 73 diagram that explains the waves. Body waves: 2 types of body waves, p wave direction of wave propagation. A compressional or longitudinal wave in which rock vibrates back and forth parallel to the.
