台灣有感地震之空間分布與發生特性之研究

• Main Authors: Hong, Qing-Jiang, 洪清講
• Other Authors: 田坤國
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/87323399992149536811

碩士 === 正修科技大學 === 營建工程研究所 === 98 === Taiwan lies in the ring of the Pacific earthquake zone which causes frequent seismic activities. Because the earthquake mechanism is too complicated, there has no clear conclusion at present. Thus, to successfully predict an earthquake is still a difficult problem. This research collected felt earthquake data from the years 1995~2009 with scales of 3 and above. The purpose of this research is to explore the relationships among the characteristics, signs and activity faults of felt earthquake. The core of this research is on the application of GIS spatial analysis, buffer analysis, overlay analysis and inquiry of the spatial relationship on the spatial analysis of the earthquake. This research focused on the top eight heavy earthquakes in the years 1995~2009 with magnitudes of 6 and above. The results showed that two possible phenomenon might occur in the frequency of the seismic activity before heavy earthquake takes place. One, the frequency of the seismic activity one month before a big earthquake is less than usual or two, the frequency one month before the earthquake is more than usual. Through buffer analysis, it was found that the epicenter of the earthquake and the activity fault surely has a distance where the nearest distance from the epicenter to the activity fault was 1.735 km. After analyzing the aftershocks, it was found that the frequency of the activity fault is more stable when the frequency of the aftershocks within one to three months after the actual earthquake increases. This research also adopted “the gravitational pull of the moon causes earthquakes” theory of Elizabeth Cochran. This research converted the dates of all the earthquakes during those years into the days in the lunar calendar for future analysis. The results showed that 62 times of the magnitude 6 earthquakes and above occurred on the first day (new moon), the 15thd day (full moon) and one to three days of occurrence reached 60% and the percentage of the occurrence of earthquakes with magnitudes 3~5.9 during these days was 45% (4423 times). As the data increases, the accuracy of the data is still fuzzy to further analysis.