李顯智博士於2017年發表的文章中提及「最強地震圓弧雙交叉」的概念，而此種交叉型態可再分為最強地震圓弧雙凸交叉、最強地震圓弧凹凸交叉，其中最強地震圓弧雙凸交叉對於預測後續強震有較佳的成效，能有較高機率預測到短天期(70天內)發生之強震，本研究針對「最強地震圓弧雙交叉」深入探討，並利用不同地震事件搜尋深度及地震圓弧精度的參數條件進行分析，期望能找出能在短天期(70天內)擁有高機率預測出強震的參數。本研究採用李顯智博士自行開發之MATLAB程式ASICAE(Automatic Searcher of Intersections of Circular Arcs of Earthquake)進行分析，分析1981年至2016年間台灣地區不同參數所預測到的最強地震圓弧雙交叉案例。本研究發現，當使用地震事件搜尋深度為0公里至30公里，以及精度條件使用弧向誤差(ToLde)為0.13~ 0.15,徑向誤差(ToLRe)為0.012 ~ 0.016之組合，進行最強地震圓弧雙交叉的搜尋，會有較佳的強震預測成效，本研究團隊推測因極淺層地殼硬且脆的性質，或是極淺層地殼因靠近地表，圍束效應較弱，所以較易釋放出能量，此研究結果也間接證明最強地震圓弧雙交叉的力學意義，說明最強地震圓弧雙交叉之相關研究，在地震預測中是具有相當程度的參考價值。;In his article published in 2017, Dr. Hin-Chi Lei proposed the concept of "the strongest double intersection of circular arcs of earthquakes (SDICAE)", which can be further divided into the strongest double-convex intersection of circular arcs of earthquakes (SDCICAE) and the strongest concave-convex intersection of circular arcs of earthquakes (SCCICAE). SDCICAE is more effective in predicting strong earthquakes and has a higher hit rate of predicting strong earthquakes that occur within a short period (70 days). This study investigates SDICAE by using different parameters of seismic event depth and seismic arc accuracy in order to find parameters that have a high hit rate of strong earthquakes prediction within a short period of time. In this study, the MATLAB program ASICAE (Automatic Searcher of Intersections of Circular Arcs of Earthquakes), developed by Dr. Hin-Chi Lei, was used to analyze the SDICAEs obtained by different parameters in Taiwan between 1981 and 2016. In this study, we found that the combination of seismic event depths of 0 to 30 km and accuracy conditions (ToLde=0.13 ~ 0.15, ToLRe=0.012 ~ 0.016) for SDICAE resulted in better strong earthquake prediction. We hypothesized that the hard and brittle nature of the very shallow crust, or the weak confinement effect of the very shallow crust near the surface, makes it easier to release strong energy. The results of this study also indirectly prove the mechanical significance of SDICAE, indicating that the study of SDICAE has a considerable reference value in earthquake prediction.
