Indonesia's Mount Ruang on Sulawesi island roared back to life on Wednesday, prompting the nation's volcanology agency to elevate the volcano's alert level to its maximum. The dramatic rise in activity comes after a series of large eruptions sent plumes of ash billowing several kilometers into the sky. Authorities responded swiftly, urging over 11,000 residents residing in the vicinity to evacuate the danger zone.
The evacuations began earlier on Wednesday after Mount Ruang's initial eruption, with at least 800 people leaving the area. However, the escalating volcanic activity spurred the Center for Volcanology and Geological Disaster Mitigation (PVMBG) to raise the alert level from Level 3 (Siaga or Alert) to Level 4 (Awas or Danger). This indicates a heightened threat of a major eruption, potentially imminent.
The raised alert level reflects the seriousness of the situation. A Level 4 designation translates to a real possibility of a large eruption that could expel volcanic ash, lava flows, and pyroclastic flows – superheated avalanches of gas and volcanic debris. It also raises concerns about a potential flank collapse, a large-scale landslide of the volcano's edifice, which could trigger a tsunami.
Mount Ruang's location adds another layer of complexity to the crisis. The stratovolcano sits near the northern coast of Sulawesi, bordering the Celebes Sea. A flank collapse triggering a tsunami is a significant concern, particularly for Tagulandang Island, located directly northeast of the volcano. The island's residents were among those prioritized for evacuation.
Indonesia, a nation straddling the Pacific Ring of Fire, is no stranger to volcanic eruptions. The archipelago is home to roughly 140 active volcanoes, making it one of the most volcanically active regions on Earth. The PVMBG continuously monitors volcanic activity throughout the country, aiming to issue timely warnings and safeguard communities residing near these volatile giants.
The current crisis unfolding on Sulawesi highlights the ever-present threat posed by volcanoes. While the immediate outcome at Mount Ruang remains uncertain, the Indonesian authorities' swift response and evacuation measures offer a crucial line of defense in mitigating potential casualties. The coming days will be critical as volcanologists diligently monitor Mount Ruang's activity, providing crucial updates to guide the ongoing response efforts.