The Analysis and Comparison of GPS and Seismometer Data

• Main Authors: Jia-JiunGuo, 郭家均
• Other Authors: Ching-Shun Ho
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/92966013114629040010

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 100 === Taiwan is between the Eurasian plate and the Philippine plate, so many earthquakes occurred. Consequently, the research on earthquake dynamics becomes important. The government of Taiwan has installed many instruments for measuring earthquakes everywhere in Taiwan. Nowadays, the accuracy of several centimeters in surface displacement can be reached, so that the earthquake dynamic response can be observed in detail. This study particularly analyzes and combines the earthquake-affected data from GPS receivers and seismometers that are set up by Central Weather Bureau (CWB). Seismometers have been used to detect the surface motions by earthquakes so many years, so their accuracy is dependable. On the other hand, the velocity and position solutions from GPS have been significantly improved in recent years. And these two instruments certainly sense the dynamic behavior from the same earthquake at the same time. As a result, the difference between them can be studied. For example, whether the difference of their time exists or not can be found by comparing their position and velocity solutions. The results from three studied earthquake cases have proved that the time difference in millisecond can be obtained. In addition, the accuracy of two centimeters in surface displacement and of two centimeters per second in plane speed can be observed by GPS.