The TEXES spectra on Jan. 10 in (red) Area 1 (maximum SO₂) and (black) Area 2 (maximum CO₂), in the 1350.10–1350.80 cm^-1 spectral range. The telluric absorption is indicated by a green line. The absolute scale of the spectrum in Area 2 has been normalized to the one of Area 1 for comparison. It can be seen that SO₂ is not detected in Area 2. At 1350.41 cm^-1, the CO₂ transition is deeper, mostly due to the higher air mass.