Diffuse CO degassing precursors of the January 2020 eruption of Taal volcano, Philippines.

On January 12, 2020, Taal volcano in Philippines erupted, 43 years after its previous eruption in 1977. This eruption was preceded by diffuse CO degassing precursory signals. Significant temporal variations in diffuse CO emission from Taal Main Crater Lake (TMLC) were observed across the ~ 12 years reaching high CO degassing rates in 2011 and 2017, with values typical of plume degassing volcanoes.