While the Galileo observations of Thor in October 2001 were the last for the spacecraft, the 2001 eruption continued to be observed by Earth-based astronomers.
As observacións feitas pola Galileo de Thor en outubro do ano 2001, foron as últimas para esta sonda, pero a erupción do 2001 continuou sendo estudada polos astrónomos dende observatorios terrestres.