The ans is - Mount Merapi
Which volcano, on the island of Sumatra, erupted in 2010 after a 400 year dormancy and has erupted every year from 2013 to 2019 including frequent volcanic earthquakes?
Ash from what volcano, when it erupted in June 2011, grounded flights in Chile, Bolivia, Argentina, Uruguay and Paraguay and disrupted air traffic over Australia and New Zealand?
When the Indonesian government in 2017 was contemplating moving its capital from Jakarta on the island of Java, what was one of the reasons published?