 Past eruptions of Quizapu Crater ejected enormous amounts of ash that traveled as far as Brazil . After the 1932 eruption , the local vegetation was devastated , and the area remained barren until the 1990s , though human life was not impacted . Despite the extent of its eruptions , the threat to humans from Quizapu is relatively small because of the remote location of Cerro Azul . Nevertheless , the size of past eruptions is large enough for scientists to be worried . Evidence of a potentially deadly threat lies in a lahar at Descabezado Grande . Historically , lahars have killed thousands in the Andes . There is , however , a possibility that a large reservoir of rhyodacite magma may exist under the Azul – Descabezado complex . If this is the case , all previous eruptions in 1846 – 1967 were only preliminary , <unk> leaks from the large magma chamber beneath , and a large caldera @-@ forming eruption may be expected in the future . 
