Earthquakes
Study questions: Measuring earthquakes 1) Given the arrival time of the following phases, check all of the source parameters of an earthquake that could be determined: phases origin time epicenter hypocenter distance P wave at 1 station P and S waves at 1 station P,pP and S waves at 1 station P waves at 3 stations P and S waves at 4 stations 2) Is the depth of an earthquake usually determined with more or less accuracy than the latitude and longitude of the epicenter? 3) Give estimates of the accuracy with which the origin time and epicentral coordinates can be determined for each of the following situations: a) a local earthquake analyzed by the single station method b) a teleseism analyzed by the single station method c) a local earthquake that is analyzed by the multiple station method using data from a local network that surrounds the event d) a teleseism that is analyzed by the multiple station method using data from a local network that is situated at a large distance from the event e) a teleseism that is analyzed by the multiple station method using data from a global network of stations 4) For what part of the world was the Richter magnitude scale first developed? 5) What type of instrument with what magnification is assumed in calculating the Richter Magnitude? 7) What is the difference in amplitude of ground motion between a magnitude 3 and a magnitude 5 earthquake?