Details Title: Earthquakes! @ SFSU Description: Study for final Total Flash Cards: 14 Created: 12/17/2006 21:46:44		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Geology Flashcards
Cards in this set: Term 3 types of plate boundaries Definition 1. Transform - parellel of eachother 2. Divergent - away from eachother - Volcanos 3. Convergetn - goes togother, underneath Term Types of faults Definition 1. Strike-slip - moves parallel 2. normal - moves away 3. reverse - moves together 4. thrust - goes underneath Term 4 types of waves Definition 1. P-wave - compression and dilatation 2. S-wave - up/down and side/side motion 3. love wave - side to side 4. Rayleigh - rolls like ocean Term 3 Factors of how you feel an earthquake Definition 1. Magnitude of Quake 2. Distance from epicenter 3. Ground/Soil Materials Term How to identify a fault trace. Definition - Surface ruptures - Offset structures (fences sidewalks) - natural features Term Attenuation Definition the reduction in amplitude of a wave with time or distance traveled. Term What type of fault is the San Andreas Fault? Definition A right lateral strike-slip transform fault Term what seismic wave travels the fastest? Definition P-Wave Term seismic waves travel through the earth by. Definition - refraction - propagation - reflection Term 3 Factors that determine the amount of energy released in a quake. Definition 1. Strength of Rocks - Stronger the rocks the more stress needed to break them 2. Area of fault rupture - bigger the fracture the more energy released 3. Distance fault moved - how much offset was there along fault Term type of seismic wave found at volcanos Definition Harmonic waves Term When do waves break? Definition waves break when water depth is 1/2 the wavelength of waves. Term Important advances in seismology resulted from Lawson report on 1906 quake. Definition 1. SA Fault is continuous geologic structure 2. Strike/slip fault 3. Reacurrance intervals 4. Elastic rebound hypothesis 5. Shaking intensity corresponds to geology 6. Damage = poor building construction Term Elastic Rebound Hypothesis. Definition 1. Start 2. Strain builds up across boundary 3. earthquake breaks fault w/strain 4. earth recovers to non strain