What We Know So Far Hi, I’m Jason, a Business Journalist at Bukit Vista. On November 19, 2025, Gunung Semeru erupted in East Java, sending ash more than 2 kilometers into the atmosphere. Will Gunung Semeru Eruption Affect Bali? . Authorities immediately issued high alert warnings and aviation advisories, including one from Australia’s Volcanic Ash Advisory Center. As of now, there are no major...