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Lin, Cheng-Horng 

林正洪 Lin, Cheng-Horng 

Distinguished Research Fellow and Deputy Director
Research Fields:Seismology, Volcano Observation, Tectonics

Research interest

Although there was no record in the human history to show any volcanic eruption in Taiwan, volcanic impact might not be totally ruled out in the future because some active volcanoes have been recognized recently. Based on the scientific survey and studies, there are some active volcanoes in northern Taiwan, including the Tatun volcano group (TVG), turtle island and some submarine volcanoes. Among them, the understanding of the TVG is very important for us because it is so close to the Taipei metropolis and two nuclear power plants along the northern coast. Since 2011, therefore, the Taiwan volcano observatory at Tatun (TVO) has been established by the Taiwan government for monitoring possible volcanic activity. In the meanwhile, we have tried to improve the understanding of the volcanic features by using broadband seismic networks (such as Formosa Array) in the TVG. In the past decade, we had identified a variety of volcanic earthquakes in the TVG such as Tornillos and monochromatic events, which are typically volcanic earthquakes detected in the active volcanoes in the Earth. Recently, a magma reservoir has been clearly identified from the evidence of both S-wave shadows and P-wave delays. Also we have observed some interesting seismic characteristics such as very-long-period volcanic events, heartbeat-like volcanic seismicity, dynamic triggering of phreatic eruption, a metaphor for volcanoes talking to each other and a seismicity conduit in the TVG. Combining those recent results with the previous geophysical and geochemical observations, we conclude that the TVG might not be totally extinct and some further investigations must be carried out in the future to improve the understanding of the volcanic characteristics in the TVG.