Analytical techniques for intraplate earthquake clarification: When, where, and how far did the active faulting occur?

Abstract

In the Japanese Island, typhoons, heavy rains, earthquakes, volcanic eruptions, and other natural phenomena occur frequently. Thus, protection from natural phenomena requires an understanding of past disaster situations, to assess potential disaster risks and raise disaster prevention awareness. Knowing the characteristics of natural phenomena that cause disasters is useful, necessitating analytical techniques for a scientific understanding. To characterize the extent of active faults that cause inland earthquakes, this paper introduces technologies that clarify when, where, and how far they occurred. Specifically, these technologies include radiocarbon dating, tephra analysis, luminescence dating, unmanned aerial vehicle (UAV) laser survey, methane gas measurement, ground-penetrating radar exploration, and magnetic susceptibility measurement.