Ibu volcano (Halmahera, Indonesia): near-frequent eruptive activity continues, two pyroclastic flows reported from field observations

Glowing lava bombs ejecting from the vent and rising ash column with simultaneously erupting Dukono in the background (image: Martin Kelko/VolcanoDiscovery)

Glowing lava bombs ejecting from the vent and rising ash column with simultaneously erupting Dukono in the background (image: Martin Kelko/VolcanoDiscovery)

The volcano has been observed by team members Adi Susanto (Andi) and Martin Kelko within the last 3 days during the ongoing Indonesia Volcano Special.

Both explosive and effusive eruption within the volcano’s caldera continues.

The main activity has been characterized by mostly near-constant small and sporadic vigorous vulcanian-type explosions, sometimes phreatic magmatic ones throwing incandescent bombs from the cone vent.

On 10 November at about 09:50 local time, a powerful explosion generated two small pumice-and-ash flows as a result of partial eruption column collapse.

Dense grey-to-black plumes sent ash about 500-1000 meters above the vent.

The continuing lava dome is actively growing as viscous magma continues to rise into it and form a faint glow on the top of the dome. Thus, it extrudes lava dome blocks into slowly advancing lava flow (so-called coulée) on the northern flank.

The drone view of the lava dome (left) and the cinder cone (right) within the Ibu caldera (image: Adi Susanto/VolcanoDiscovery)

The drone view of the lava dome (left) and the cinder cone (right) within the Ibu caldera (image: Adi Susanto/VolcanoDiscovery)