TEMPO.CO, Jakarta - Tempo English compiled the top 3 news on Monday, September 7, 2026. Here are the highlights: Mount Anak Krakatau Ash Spreads Across Jakarta, Java and Sumatra; How to Stay Safe from Volcanic Ash Exposure: Expert Guide; and Mount Semeru Hiking Trails Closed as Volcano Erupts, Forest Fires Spread.
1. Mount Anak Krakatau Ash Spreads Across Jakarta, Java and Sumatra
The volcanic ash from the eruption of Mount Anak Krakatau in Indonesia became a topic of public discussion on the morning of Sunday, September 6, 2026. Several regions experienced ashfall, specifically in western Java, including Jakarta and its surrounding areas. The spread of volcanic ash also reached parts of Sumatra.
According to information from the MAGMA Indonesia website (Ministry of Energy and Mineral Resources), Mount Anak Krakatau is continuing to erupt, an activity that has been ongoing since last Friday morning. Recent eruptions were recorded by seismographs at times including 05:53 and 07:10 WIB (Western Indonesian Time). Click here for a detailed report.
2. How to Stay Safe from Volcanic Ash Exposure: Expert Guide
Volcanic ash has blanketed several regions across Indonesia, including Greater Jakarta (Jabodetabek), following continuous eruptions from Mount Anak Krakatau in the Sunda Strait.
Epidemiologist from Griffith University in Australia, Dicky Budiman, warns that volcanic ash is far more hazardous than regular dust. "This volcanic ash is very different from ordinary ash or dust because it contains silica, which acts like sharp glass shards and can cause damage, especially to exposed organs including the eyes, nose, mouth, and skin," Dicky told ANTARA on Sunday, September 6, 2026. Find out the guide here.
3. Mount Semeru Hiking Trails Closed as Volcano Erupts, Forest Fires Spread
Indonesia's Mount Semeru erupted in East Java on Sunday morning, sending an ash column 1,000 meters above its summit as forest fires continued to spread across the mountain's slopes and authorities kept its hiking trails closed.
As reported by Antara, the eruption adds to safety concerns around Java's highest mountain, where a wildfire has reportedly burned more than 3,000 hectares of forest, according to data from the Bromo Tengger Semeru National Park (TNBTS). Read more here.
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