Mount Ruang volcano in North Sulawesi erupted on Tuesday morning, ejecting ash over five kilometres into the atmosphere and prompting authorities to close Sam Ratulangi International Airport in Manado and reinstate a six-kilometre exclusion zone. The eruption, representing the second major incident this month, came after earlier eruptions forced the evacuation of over 6,000 residents, with officials warning of hazards including incandescent rocks, hot clouds, and potential tsunamis. The incident