Qualla: Mount Ruang

Mount Ruang: Introduction

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Unknown author, CC BY-SA 3.0. From the summit of Mount Ruang, you can see three worlds. To the south, the peak of Mount Klabat rises above the Sulawesi mainland. Northward, Siau Island marks the next link in the Sangihe volcanic chain. To the east, Ternate glimmers across the sea. Ruang itself is the southernmost stratovolcano in the Sangihe Islands arc, a 725-meter cone that constitutes an entire island in North Sulawesi. It has erupted at least 16 times since 1808, and its most recent outburst in April 2024 reminded everyone within a thousand kilometers that this small island volcano punches far above its weight.

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Image: Unknown author | CC BY-SA 3.0

Mount Ruang: Anatomy of an Island Volcano

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Unknown author, CC BY-SA 3.0. Ruang is a volcanic island in the most literal sense: the mountain is the island and the island is the mountain. The summit is partially filled by a lava dome formed during eruptions in 1904, and subsequent activity has produced additional domes and pyroclastic flows that have re...

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Image: Unknown author | CC BY-SA 3.0

Mount Ruang: April 2024: The Sky Goes Dark

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Unknown author, CC BY-SA 3.0. The eruption sequence began in mid-April 2024 and escalated rapidly. Authorities established a 4-kilometer exclusion zone around the crater, then extended it to 6 kilometers. On 17 April, Indonesia raised the alert to level four, its highest, and issued a tsunami warning based on...

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Image: Unknown author | CC BY-SA 3.0

Mount Ruang: A Plume That Crossed Borders

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Tumanisme, CC BY-SA 4.0. When Mount Ruang erupted again on 30 April, the consequences reached far beyond North Sulawesi. Airports as distant as Gorontalo Province were forced to close. All 843 residents of Ruang Island were evacuated to Manado, while 12,000 people on Tagulandang were relocated to Siau Is...

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Image: Tumanisme | CC BY-SA 4.0

Mount Ruang: Living Beside the Fire

Thu, 09 Apr 2026 00:00:00 GMT

Photo credit Forestriqiraniwd, CC BY-SA 4.0. The 843 residents of Ruang Island were not strangers to evacuation. The volcano's eruption history stretches back over two centuries, and life on the island has always been a negotiation with geological risk. Fishing communities have rebuilt after eruptions, resettled after evacu...

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Image: Forestriqiraniwd | CC BY-SA 4.0