Activity of Veniaminof, Ambrym and Merapi.

At Veniaminof, a small activity continues this week at the intracaldeira cone. The western branch of the lava field on the southern flank remains active.

Constant steam emissions can be seen on the Perryville webcam.

On October 18, the emissions were particularly strong, with a plume dominated by steam, with the presence of sulfur dioxide and a small amount of ash, and extending for 30 km to the northeast.

The effusion of lava continues, as indicated by a relatively continuous tremor.

The Veniaminof remains in Volcanic Alert Watch and Orange Aviation Code

Source: AVO

The images provided by Tropomi show significant sulfur dioxide emissions at Ambrym volcanoes in Vanuatu, and the interaction of the plume on Malekula Island, further west with more than 20,000 inhabitants.
 

An image of Caliop / Nasa determined the height of the July 30, 2018 sulfur-containing aerosol cloud in the stratosphere, impacting a large area.

Four lava lakes are currently active on the island.

Sources: AIRES, Tropomi, Nasa Caliop via Simon Carn.

At Merapi, the phase of effusive activity continues: the dome reaches 18 October a volume of 201,000 m³, with a daily rate of growth rising to 6,200m³. The small lobe of the dome on the north side seems to progress.

The dome is considered stable for the moment, and the level of activity remains at 2 / Waspada, with a forbidden zone of 3 km radius around the summit.

Source: PVMBG