In a statement, the national volcanological agency warned residents against these dangerous phenomena, especially in the event of rain near the crater.
The Merapi had already erupted last week, expelling volcanic material up to 3000 meters above its summit. At least eight Indonesian villages were affected by the ash fallout. According to several specialists, the volcano – placed at the second highest alert level – would go through its most active phase since 2021. A restricted access zone of seven kilometers from the highest point, located at some 2900 meters above sea level , was set up by the local authorities.