TAIPEI (TVBS News) — A magnitude 6.4 earthquake struck Chiayi's Dapu Township (嘉義大埔) early Tuesday (Jan. 21), shaking the region without causing surface ruptures. The Central Weather Administration (CWA, 中央氣象署) reported the quake's depth at 9.7 kilometers, occurring away from fault lines. Videos circulating online purportedly showing earthquake lights in Alishan (阿里山) and Kaohsiung have ignited public curiosity.
Wu Chien-fu (吳健富), director of the Seismological Center (地震測報中心), clarified the phenomenon. He stated that there is no concept of earthquake lights in seismology, and the lights in the videos are unrelated to the earthquake. Wu explained that if a quake causes surface ruptures, it might produce lights due to positive and negative charges. However, the recent earthquake's depth and location make such occurrences unlikely.
The earthquake occurred near three fault lines, though the Seismological Center has not determined any connections. Wu emphasized Taiwan's complex seismic activity, particularly around Dapu, Jiasian District (甲仙), and Tauyuan District (桃源), due to the interaction between the Philippine Sea Plate and the Eurasian Plate.
As investigations continue into the earthquake's origins, Wu's insights remind residents of the region's intricate geological dynamics. The public remains attentive to further updates from authorities, seeking clarity and reassurance in the wake of the event.
