For the Balinese, Agung is a terrestrial echo of Mount Meru, the mythic axis at the center of Hindu-Buddhist cosmology. Every temple on the island orients itself in relation to this peak. Every compound, every village layout, every bed in every household follows the same sacred geometry: toward Agung is upstream, holy, the direction of the gods. Away from Agung is downstream, toward the sea, the realm of demons. At 3,142 meters, it is Bali's highest point, and from a distance it appears perfectly conical -- a textbook stratovolcano framed against tropical sky. On clear mornings, the summit offers views east to Mount Rinjani on Lombok. But Agung is frequently wrapped in cloud, as though guarding its own privacy.

The warnings began on February 18 with loud explosions and clouds billowing from the crater. Six days later, lava started creeping down the northern slope, advancing seven kilometers over twenty days. Then came the cataclysm. The March 17 eruption rated VEI 5 on the volcanic explosivity index, one of the most powerful eruptions in Indonesian history. Massive pyroclastic flows -- superheated avalanches of gas, ash, and rock -- swept through villages at terrifying speed, killing an estimated 1,100 to 1,500 people. Heavy rains afterward generated cold lahars, mudflows that killed another 200. A second major eruption on May 16 claimed 200 more lives. The violence continued for almost a year. Among its stranger consequences: the USAT Liberty, a World War II transport ship torpedoed by a Japanese submarine and beached at nearby Tulamben, shook free of the shore and slid fully underwater, where it remains today as one of Bali's most famous dive sites.

Agung does not merely dominate the landscape visually. It shapes Bali's climate in ways that touch every rice paddy and forest on the island. The mountain range creates a pronounced rain shadow, splitting Bali into a wetter southern half and a drier northern strip. Between 1984 and 2009, the south received an average of 2,025 millimeters of rain per year while the north got just 1,761. This asymmetry determines where rice grows best, where forests are densest, and where fire risk is highest. In September 2023, nearly half of all wildfires recorded across Bali's forests and savannas burned in Karangasem Regency, the district surrounding Agung. The volcano giveth and the volcano taketh away.

For more than fifty years after 1963, Agung slept. Then in September 2017, the ground began to tremble. On September 26 alone, seismologists recorded 300 to 400 volcanic earthquakes. Authorities declared a twelve-kilometer exclusion zone and evacuated roughly 122,500 people from their homes. Evacuees crowded into sports halls and community buildings across Klungkung, Karangasem, and Buleleng. By late October the tremors subsided, and the emergency level was lowered. It was a false calm. On November 21, a phreatic eruption sent ash to nearly 4,000 meters. Four days later, a magmatic eruption followed, its plume rising four kilometers above the crater and drifting south, dusting surrounding villages in dark ash and canceling international flights to Australia and New Zealand. An orange glow at the crater rim confirmed fresh magma had breached the surface. More than 100,000 people were ordered to evacuate. Eruptions continued intermittently through 2018 and into May 2019, disrupting air traffic and reminding Bali that its holiest mountain operates on its own timetable.

Pura Besakih still clings to Agung's slopes, the most important temple complex on the island, its tiered meru towers pointed toward the summit where the gods reside. Pilgrims still climb the mountain to pray. Farmers still cultivate its fertile flanks, enriched by centuries of volcanic ash. The relationship between the Balinese and their volcano is not one of fear so much as negotiation -- an ancient understanding that the same forces that threaten also sustain. The eruptions of 2017-2019 proved this relationship endures. Evacuees returned as soon as authorities allowed, rebuilding on the same slopes. From the air, Agung's crater is a dark wound near the summit, a reminder that this mountain is not finished. Five thousand years of eruption records suggest it never will be.