Mount Batur Volcano History: Eruptions & Temple Relocation

Earth Sciences

The Double Caldera Formation

Mount Batur is a highly active stratovolcano situated within the Bangli Regency of Bali. The most remarkable feature of the landscape is the massive double caldera, which is a result of two ancient, catastrophic collapses of the volcanic dome.

The larger outer caldera formed approximately **29,300 years ago** during a super-eruption that blasted tons of volcanic tuff across Bali. This collapse created a vast depression measuring 10 by 13 kilometers in diameter. A second, smaller inner caldera formed about **20,150 years ago** during a subsequent volcanic collapse. The western half of this inner caldera is now occupied by Mount Batur's modern active cone, which rises 1,717 meters above sea level.

The eastern half of the caldera depression contains Lake Batur, a crescent-shaped body of water that is the largest lake on the island. Fed by rainfall and deep underground volcanic springs, the lake is highly sacred to the Balinese people. It is the ultimate source of water for the major rivers and agricultural canals in southern Bali, feeding the cooperative Subak rice fields that sustain the island's population.

Photo by Rainhard Findling / Openverse

Eruption Archives

Eruptive Timeline of Mt Batur

Since the first documented records in 1804, Mount Batur has erupted at least 26 times, constantly shaping the landscape of the Kintamani highlands.

1804

First Documented Eruption

The Bangli royal scribes recorded the first major modern eruption, which sent thick plumes of dark ash and small lava flows cascading down the northern slopes.

1917

The Gehenna Year of Bali

A massive volcanic event caused severe earthquakes and mudslides across Bali. Over 65,000 homes and 2,500 temples were destroyed, claiming thousands of lives. However, local temple shrines at the base of the volcano remained untouched by the lava flows.

1926

The Karang Anyar Disaster

A catastrophic, slow-moving basaltic lava flow devastated the lakeside village of Karang Anyar. The original Pura Ulun Danu Batur temple was buried under a 10-meter deep layer of solidifying black lava, forcing the relocation of the entire community.

1963

Cooperative Eruptive Phase

Coinciding with the catastrophic eruption of Mount Agung, Mount Batur entered a highly active state. Strombolian explosions blanketed the surrounding Kintamani farms in thick grey ash clouds, destroying vegetable crops.

2000

The Last Major Eruption

The most recent eruptive phase. The volcano produced dramatic strombolian eruptions, throwing glowing lava bombs and ash plumes 300 meters above the summit vents, forming the modern black lava fields visible today.

Sacred Heritage

The Miraculous Relocation of Pura Ulun Danu Batur

The spiritual story of Mount Batur is closely tied to the history of **Pura Ulun Danu Batur**, the second most important temple in Bali after Pura Besakih.

Originally, this sacred temple stood at the foot of Mount Batur within the caldera, dedicated to **Dewi Danu**, the goddess of the lake. During the devastating 1926 eruption, a slow basaltic lava flow advanced directly towards the temple and the lakeside village of Karang Anyar. While the village was completely decimated and buried, the sacred **11-tiered meru shrine** (the highest and most sacred tower) miraculously survived the encroaching lava, standing untouched on a tiny island of rock.

Recognizing the extreme geological danger, the Bangli Regency authorities and the local high priests ordered the permanent relocation of the entire community and the temple. The villagers climbed out of the caldera and settled on the higher, safer **rim of the caldera** in Kintamani. There, they rebuilt Pura Ulun Danu Batur. Today, this beautiful temple stands on the mountain ridge, looking down into the volcanic caldera, where it continues to manage the cooperative irrigation schedules of the Subak networks across Bali.

Photo by Horst Emscher / Openverse

Volcanic History & Culture