The July eruptive episode was preceded by several days of measurable expansion of the summit area, heightened earthquake activity, and changed emission rates of sulfur dioxide and carbon dioxide.
Episoadele eruptive din iulie au fost urmate de câteva zile de expansiune a zonei de vârf, activitate sporită de cutremur, și-a schimbat rata de emisie de dioxid de sulf și dioxid de carbon.