https://phys.org/news/2018-05-indonesia-volatile-volcano-erupts.html

He said the alert level of the volcano was not raised, which is at a normal level with no eruption expected in the foreseeable future.

An eruption of Merapi on May 11 sent nearby residents fleeing to safer areas. There have been no reports of casualties, and operations at Adi Sucipto airport in Yogyakarta was not disturbed by Monday's eruptions.