Definition
Mount Agung is an active stratovolcano located on the island of Bali in Indonesia. It is the highest point on the island, with an elevation of approximately 3,031 metres (9,944 feet) above sea level, and is considered a culturally sacred site in Balinese Hinduism.
Overview
Mount Agung dominates the central part of Bali, lying about 30 km (19 mi) northeast of the island’s capital, Denpasar. The volcano’s summit complex consists of a crater and several lava domes formed by successive eruptive phases. Historically, Agung has produced intermittent volcanic activity, with notable eruptions recorded in 1963–1964 and a more recent eruptive sequence that began in late 2017 and continued into 2019. These events prompted widespread evacuations, temporary airport closures, and ashfall that impacted agriculture and air travel across the region.
Mount Agung’s flanks host the Besakih Temple complex, often referred to as the “Mother Temple” of Bali, underscoring the mountain’s spiritual significance to the local population. The volcano contributes to the island’s watershed, supplying water to surrounding communities and supporting diverse montane ecosystems.
Etymology/Origin
The name “Agung” derives from the Balinese and Indonesian word agung, meaning “great,” “high,” or “grand.” The term reflects the mountain’s prominent stature and its revered status within Balinese cultural and religious traditions.
Characteristics
- Geology: Mount Agung is a composite (stratovolcano) built from alternating layers of lava flows, ash, and pyroclastic material. Its primary composition includes andesitic to basaltic lava.
- Structure: The volcano features a summit crater approximately 1.5 km in diameter, surrounded by lava domes and fissure vents that have produced historic eruptions.
- Volcanic Activity: Documented eruptive episodes date back several centuries, with the most violent recorded eruption occurring in 1963–1964, which produced pyroclastic flows, ash plumes up to 15 km high, and significant loss of life. The 2017–2019 eruptive phase involved intermittent ash emissions, lava extrusion, and minor ashfall, prompting the Indonesian Center for Volcanology and Geological Hazard Mitigation (CVGHM) to issue multiple alert levels.
- Ecology: The upper slopes support montane forest ecosystems dominated by endemic plant species such as Ficus spp., Rhododendron spp., and various orchids. Faunal inhabitants include the Bali starling (Leucopsar bonasia) and several species of macaques.
- Hazards: Potential hazards associated with Agung include pyroclastic density currents, lahars (volcanic mudflows) triggered by heavy rainfall, ashfall, and volcanic gas emissions (e.g., sulfur dioxide).
Related Topics
- List of volcanoes in Indonesia – Mount Agung is part of Indonesia’s extensive volcanic arc.
- Besakih Temple – The primary Hindu temple complex situated on the slopes of Mount Agung.
- 2017–2019 Mount Agung eruption – Recent eruptive activity that affected regional air travel and prompted large‑scale evacuations.
- Bali – The island’s geography, culture, and economy are closely linked to the presence of Mount Agung.
- Indonesian Center for Volcanology and Geological Hazard Mitigation (CVGHM) – The agency responsible for monitoring Agung’s activity and issuing alerts.