摘要(英) |
This study attempts to apply the concept of "the strongest intersection of the circular arcs of earthquakes" which currently used in Taiwan to regions in and around California and Alaska. When searching for the earthquake events from the earthquake catalogue, we gradually decrease the magnitude of earthquakes events from 6 or higher until the first intersection of the circular arcs appears and call it "the strongest intersection of the circular arcs of earthquakes". If in one region there are multiple circular arcs at the same time with the same minimum event magnitude, the arcs with the earliest confirming time will be selected to from the intersection. Then, the intersection will be analyzed and we try to find the relation between the intersection and the nearby strong earthquakes happened after the formation of it.
At the same time, the study will establish an earthquake catalogue for research. The earthquake catalogue is divided into two regions of Alaska and California. And the selected data for earthquake events are from the first half of 2005 to the second half of 2014. In Alaska we found 19 strongest intersections of the circular arcs of earthquakes, and in California we found 15 strongest intersections of the circular arcs of earthquakes. The circular prediction reigon of strong earthquakes takes the intersection point as the center and 70 km or Lmin/4 as the radius. Here Lmin/4 represents a quarter of the shortest arc length in the two arcs of the intersection. Afterwards, each intersection is regarded as a case to explore how many days required for the subsequent strong earthquakes in the prediction area, and then we carry out the statistics and analysis of all the intersections from the first half of 2005 to the second half of 2014, and then discuss the impact of the strong earthquake.
Alaska、California and Taiwan are all belong to the Circum-Pacific Seismic Zone. The Aleutian Islands which located below Alaska belong to volcanic zone and subduction zone, and San Andreas Fault is transform fault crossing California from north to south. The study will explore the application of the strongest intersection of the circular arcs of earthquakes in these two regions.
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參考文獻 |
[ 1 ] H.C. Lei and C.W. Tang, “Circular Arcs and Curvilinear Distributions of Events of Earthquakes in Taiwan”,The Thirteenth National Conference on structural Engineering / The Third National Conference on Earthquake Engineering,Taoyuan,Taiwan, ROC,2016.
[ 2 ] H.C. Lei, “Circles, Circular Arcs and Lines of Earthquakes Around Taiwan”,
The 40th National Conference on Theoretical and Applied Mechanics,
Hsinchu, Taiwan, ROC, November 25-26, 2016.
[ 3 ] H.C. Lei, “Some Ideas For Constructing Significant Intersections Of Circular Arcs Of Earthquakes”, 2017 Taiwan-Japan Joint Symposium on the Advancement of Urban Earthquake Hazard Mitigation Technology
[ 4 ] H.C. Lei, “Circles, Circular Arcs and Lines of Earthquakes Around Taiwan
(II): Magnitude and Time”, 2017 the 15th Conference on Land Studies,
Tainan, Taiwan, ROC, May 12, 2017.
[ 5 ] H.C. Lei, W.Y. Tsai, C.P. Yu, Y.C. Shih, P.Y. Sun, Y.Y. Chen, M.H. Chen“An Elementary Evaluation Of Efficiency Of A Method Of Earthquake Prediction By Intersections Of Circular Arcs Of Earthquakes Around Taiwan”, 2017 Taiwan-Japan Joint Symposium on the Advancement of Urban Earthquake Hazard Mitigation Technology
[ 6 ] 游敬枰,「從2003到2013年台區域地震圓弧交叉與大地震之關聯」,國立中央大學,碩士論文,民國106年6月。
[ 7 ] 中央氣象局,http://www.cwb.gov.tw/
[ 8 ] 美國地質調查局,https://www.usgs.gov/
[ 9 ] 李錫堤,台灣區學校校舍耐震性能改善研討會分區講習共同資料 , l999年1月
[ 10 ] 黃泓鈞,「阿拉斯加與加州地區最強地震圓弧交叉分析(1995年~2004年)」,國立中央大學,碩士論文,民國108年6月。
[ 11 ] H.C. Lei, “Strongest Double Intersections of Circular Arcs of Earthquakes around Taiwan”,The 23rd Forum on Land Use and Planning,Tainan, Taiwan, ROC, March 23, 2019.
[ 12 ] H.C. Lei : ASICAE by HinChi Lei to find the strongest intersections of circular arcs of earthquakes, 2019年2月26日,https://youtu.be/tvgYLpoH9T4
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