https://phys.org/news/2018-06-indonesia-merapi-volcano-ejects-towering.html > It said the eruption at 8.20 a.m. caused no panic and nearby Adi Sucipto Yogyakarta International Airport is still open to flights. > The mountain is about 30 kilometers (18 miles) from center of Yogyakarta city on the densely populated island of Java.