This figure shows the SiO spectra together with the results of Gaussian fitting. Black curves represent the SiO spectra extracted from positions in Figure 2. The red curves report the total Gaussian fits to the SiO spectra using pyspeckit and the blue curves represent the Gaussian fit lines of the different components. The green dashed parallel line indicates the 3σ noise levels of the SiO emission. The vertical dashed gray line marks the central velocity of Cloud H (45.5 km ⁻¹). The residuals of the fitting results are shown as gray lines at the bottom of each panel, with the gray parallel line representing the residual zero baseline. The corresponding green numbers (see Figure 2) are displayed at the top left corner of each panel, and the Gaussian fitting results are shown at the top right corner.