Sinabung (Sumatra, Indonesia): Another large pyroclastic flow occurred yesterday morning. The flow traveled 2-3 km to the base of the mountain and produced an impressive coignimbrite ash plume that rose to approx. 4 km altitude.
The volcano’s eruption continues mostly quietly to effuse viscous lava, feeding a flow emplaced on the upper southeastern flank. At times, such as yesterday, it becomes too unstable and smaller or larger parts of it can collapse, generating dangerous pyroclastic flows.
The lava flow towards the Trinidad and Ceniza canyon on its upper flank remains weakly active, although seems to be decreasing.
Guatemala’s international airport has resumed operations.
sent us this great photo from the first evening of the eruption, showing the typical alignment of active vents along the eruptive fissure.
Visit Pierre’s site: www.pierrechoukroun.com
The eruption continues without major changes. The volcano observatory OVPF reports low, but stable tremor levels. Webcam imagery from last night (before clouds obscure views) show that the eruption is mainly effusive with only weak explosive activity (weak spattering) at the vents.
Currently, a small lava flow is active that extends approx 500 m from the base of the Dolomieu cone, enlarging the new lava field of partially overlapping flows at its base. The middle section of the lava flow is through a lava tube, making it invisible in this part on the webcam images.