Analysis on M7.3 earthquake occurred in the sea area of Hualien County，Taiwan，China and the possibility of its triggering volcanic activity

• Published in: 地震科学进展 Vol. 54; no. 4; pp. 292 - 298
• Main Authors: Yujia Song, Xiaodong Pan, Jianhong Kang, Guohui Gu, Sheng Guan, Mengmeng Li
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Progress in Earthquake Sciences 01.04.2024
• Subjects: kueishantao volcano; m7.3earthquake in taiwan; volcanic activity
• ISSN: 2096-7780
• DOI: 10.19987/j.dzkxjz.2024-057

A magnitude 7.3 earthquake occurred at 7:58 a.m. (Beijing time) on April 3, 2024, in the sea area of Hualien County, Taiwan Province, China (23.81°N，121.74°E), which had a large seismic hazard impact and attracted widespread attention at home and abroad. This paper introduces the geological and tectonic background of the earthquake and its disaster influence, as well as the volcanic activity on Kueishantao volcano that partially collapsed as a result of the seismic effect, and focuses on a comprehensive analysis of the possibility of whether the earthquake will trigger the volcanic activity. Through the analysis of seismic and hyperspectral gas data, it can be seen that the Kueishantao volcano has not yet shown obvious anomalous responses. Then the probability of triggering is quantitatively judged by introducing the non-dimensional index of earthquake triggering potential volcanoes，and the TRIGI value is 19.8 (> 10), which indicates that the probability of earthquake-triggered eruption of Kueishantao volcano