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Six Indonesian volcanoes erupt in rare simultaneous event, spreading ash across Java and Sumatra

By LineZotpaper
Published
Read Time2 min
A rare chain of eruptions from six Indonesian volcanoes has dusted parts of Java and Sumatra with ash, disrupting flights and affecting more than 340,000 passengers, with volcanic ash reaching as far as the capital Jakarta—about 150 kilometres from one of the active craters.

Six volcanoes across Indonesia have erupted within a short window, an event described as "rare" even for a country that is home to around 500 volcanoes and one of the most volcanically active regions on Earth. The eruptions have spread ash across parts of Java and Sumatra, leading to widespread disruption, including the suspension of thousands of flights and impacts on more than 340,000 passengers, among them Australian travellers.

Anak Krakatau, the volcano closest to Jakarta, remains at Level III or "Alert" status, with a three-kilometre exclusion zone in place. As of Thursday, Indonesia's Meteorology, Climatology and Geophysics Agency (BMKG) was also detecting ash from at least four other volcanoes: Mount Lewotolo, Mount Ibu, Mount Dukono and Mount Semeru.

For many residents, the experience has been surprising. Cendy Rahmat, who grew up near Mount Merapi in Yogyakarta and moved to Jakarta in 2019, said he never expected to face volcanic ash in the capital. "I thought I wouldn't be affected by a volcano-related disaster in Jakarta," he said. "I was surprised it could reach us." The Jakarta government confirmed earlier this month that ash from Anak Krakatau had reached parts of the capital.

This is not Mr Rahmat's first brush with volcanic ash. In 2010, while in high school, he experienced Mount Merapi's biggest eruption in more than a century, which killed more than 300 people. Four years later, he was covered in ash from East Java's Mount Kelud. "The ash was incredibly thick," he recalled.

The eruptions have reignited concerns about living alongside volcanoes, even in urban areas thought to be out of reach. Authorities continue to monitor the situation, with Anak Krakatau's alert level indicating ongoing risk.

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Analysis

Why this matters

  • The simultaneous eruptions of six volcanoes highlight the persistent and unpredictable volcanic threat faced by Indonesia, a country with a dense population living near active peaks.
  • The ash has already disrupted air travel and affected hundreds of thousands of passengers, including Australians, pointing to the economic and social fallout that can ripple beyond Indonesia's borders.
  • The event raises questions about preparedness and early-warning systems in a region where volcanic activity is common but still capable of surprising even experienced residents in major cities like Jakarta.

Background

Indonesia sits on the Pacific Ring of Fire, an area of intense tectonic activity that gives rise to frequent earthquakes and volcanic eruptions. The country has roughly 500 volcanoes, many of them active, and a long history of deadly eruptions, such as Mount Merapi's 2010 blast and Mount Kelud's 2014 event. Volcanic ash can travel hundreds of kilometres, disrupting aviation and covering communities far from the crater. This incident is notable not because of a single large eruption, but because several volcanoes erupted in a short period, spreading ash across a wide area and straining regional response efforts.

Key perspectives

  • Residents and affected travellers: People like Cendy Rahmat represent a public that has adapted to living near active volcanoes but may be caught off guard when ash reaches urban centres like Jakarta. Their experiences underscore the everyday uncertainty of life in volcanic zones.
  • Indonesian authorities (BMKG and disaster agencies): Official agencies are monitoring the eruptions, maintaining evacuation zones and issuing ash advisories, reflecting a focus on public safety and aviation hazard management. The decision to keep Anak Krakatau at Alert Level III suggests ongoing risk assessment.
  • Critics and sceptics: Some may question whether the 'rare' label is helpful, given that Indonesia experiences frequent volcanic activity. Others may argue that the disruption to flights and the movement of ash across boundaries highlight gaps in regional coordination and long-term mitigation strategies.

What to watch

  • Whether Anak Krakatau's alert level rises from Level III, leading to expanded exclusion zones or renewed flight cancellations.
  • Reports of additional ash clouds from the other four active volcanoes, which could extend the crisis and heighten health risks for residents.
  • Travel advisories from countries like Australia, and whether airlines extend flight suspensions as ash drifts along major routes.

Sources

Zotpaper

Written by software from the reporting listed above, scored by an automated standards desk, and published without a person reading it first. If something here is wrong, tell the editor and it will be put right.

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