Indonesia’s Anak Krakatau volcano has erupted repeatedly, sending a massive ash cloud soaring to an altitude of 50,000 feet.

Indonesia’s Anak Krakatau volcano once again showed signs of dangerous activity on Saturday and Sunday, erupting violently and sending a massive ash cloud soaring to an altitude of nearly 50,000 feet. The thick volcanic ash cloud disrupted several flights at Jakarta’s main international airport, Soekarno-Hatta International Airport, causing difficulties for thousands of passengers.

According to the Antara News Agency, flight operations at Soekarno-Hatta Airport had to be temporarily suspended as a precautionary measure to ensure aviation safety. Authorities said the volcanic ash had risen to an altitude of around 50,000 feet, making flying in the affected area extremely hazardous.

Experts say volcanic ash can pose a serious threat to aircraft. It can enter jet engines and cause damage, while also reducing visibility for pilots. For this reason, several flights were cancelled or delayed to ensure passenger safety, while some international flights were forced to change their routes.