Supplemental data (b-values & Vp/Vs ratios) at the Tatun Volcano Group in Northern Taiwan

The time-varying b-values data were calculated by using the algorim of maximum likelihood estimation and data of earthquakes within a depth of 3 km in the TVG.
The Vp/Vs ratios are extracted by the locations of relocated earthquakes in the TVG with 4 dimensional velocity model.
The data of manually picking P- and S-wave arrival time were provided by the Taiwan Volcano Observatory at Tatun (https://tvo.earth.sinica.edu.tw/).