Supplemental data (FPS & St/CO2) and parameters of HypoDD @ TVG

YM_14-17.fps is a catalog of the focal mechanisms in the Tatun Volcano Group, Northern Taiwan. The source parameters of the focal mechanism were inverted using the double-difference algorithm (Waldhauser & Ellsworth, 2000) with the latest velocity model (Pu et al., 2020; doi:10.1038/s41598-020-63270-7). Picking data of these focal mechanisms are from the Taiwan Volcano Observatory at Tatun (https://tvo.earth.sinica.edu.tw/).

St/CO2.txt is the observed St/CO2 from the fumarolic gases at the Dayoukeng area in the Tatun Volcano Group, Northern Taiwan. This is a mean of the observed St/CO2 ratio calculated within a time window of 100 days. The original data is available to request from the Taiwan Volcano Observatory at Tatun (https://tvo.earth.sinica.edu.tw/).

Parameters_hypoDD_TVG.docx is the information of data criteria and parameters used by the programs ph2dt and HypoDD.

YM_14-17.fps 为台湾北部大屯火山群的震源机制（focal mechanism）目录。其震源参数通过双差算法（double-difference algorithm；Waldhauser & Ellsworth, 2000）结合最新速度模型（velocity model；Pu et al., 2020; doi:10.1038/s41598-020-63270-7）反演得到。上述震源机制的震相拾取数据源自台湾大屯火山观测站（Taiwan Volcano Observatory at Tatun，https://tvo.earth.sinica.edu.tw/）。

St/CO2.txt 收录了台湾北部大屯火山群大油坑地区喷气孔气体的观测St/CO2比值。该数据为100天时间窗口内计算得到的观测St/CO2比值的平均值。原始数据可通过台湾大屯火山观测站（Taiwan Volcano Observatory at Tatun，https://tvo.earth.sinica.edu.tw/）申请获取。

Parameters_hypoDD_TVG.docx 包含了程序ph2dt与HypoDD所使用的数据标准及相关参数信息。