Mount Marapi blankets parts of West Sumatra in ash, Indonesia

Volcanic activity at Mount Marapi in West Sumatra increased on Sunday, October 27, beginning with an ash plume eruption at 07:00 local time. This initial event recorded a maximum amplitude of 27 mm (1.06 inches) on seismographs, accompanied by an ash column reaching a considerable height. Following this, subsequent eruptions showed slightly lower amplitudes but retained significant ash emissions.

At 07:36 local time, a second eruption occurred, producing an ash column of approximately 800 m (2 620 feet) above the peak. This event reached a maximum amplitude of 3.6 mm (0.14 inch) and lasted about one minute and 10 seconds.

Later, at 09:56 LT, a third eruption generated an ash column rising up to 2 000 m (6 561 feet) in the direction of the northwest. It was recorded with a maximum amplitude of 1.8 mm (0.07 inch) and lasted for 59 seconds.

The day’s fourth eruption took place at 16:01 LT, sending an ash column up to 800 m (2 624 feet). It had a maximum amplitude of 1.6 mm (0.06 inch) and lasted around one minute and two seconds.

“Ash column of about 1 000 m (3 280 feet) observed from the summit. Meanwhile, if measured from sea level, the height of the ash column reaches 3 891 m (12 765 feet),” said Aziz Yuliawan, an officer at the Marapi Volcano Monitoring Post.

This eruption comes after increasing volcanic tremor and seismic activity that began on October 7, indicating a rising trend in Marapi’s volcanic activity.

Since early this month, the volcano’s emissions have changed from phreatic eruptions (steam explosions) to magmatic eruptions, indicating a more profound and probably persistent volcanic movement. 

The shift from phreatic to magmatic eruptions has prompted PVMBG officials to tighten safety precautions, including a 3 km (2 miles) exclusion zone surrounding the volcano to safeguard inhabitants and climbers.

No confirmed injuries or structural damage have been reported, but local communities in the Agam and Tanah Datar districts of West Sumatra have been advised to remain vigilant. 

Mount Marapi, Indonesia’s most active volcano, stands on the island of Sumatra in West Sumatra province. 

This location is a known hotspot for seismic and volcanic activity as part of the Pacific “Ring of Fire.” The volcano, about 2 900 m (9 514 feet) tall, is surrounded by densely inhabited areas, prompting concerns about future eruptions hurting adjacent populations.

This eruption of Mount Marapi adds to a series of recent volcanic activities in the region, including the deadly December 2023 eruption that killed 24 climbers. 

Officials from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) monitor the situation. 

References:

¹ Indonesia’s Mount Merapi erupts, spews ash – Philippine News Agency – October 28, 2024

² Mount Marapi Sees Increased Volcanic Activity Since 7 October – INP – October 28, 2024

Harsha Borah

Harsha Borah is an experienced content writer with a proven track record in the industry. Harsha has worked with LitSpark Solutions and Whateveryourdose, honing skills in creating engaging content across various platforms. A gold medalist in a state-level writing competition organized by Assam Tourism, Harsha’s travelogue on Tezpur was widely appreciated. Harsha’s article, "The Dark Tale of the Only Judge in India to Be Hanged," ranks second on Google and has garnered over 11 000 views and 8 900 reads on Medium. Outside of writing, Harsha enjoys reading books and solving jigsaw puzzles.

This author does not have any more posts.