Great Sitkin volcano (Aleutian Islands, Alaska): actively growing lava dome reached over 1 km width
The active lava dome continues to grow with magma rising into it as confirmed by a new satellite data that depicts the dark mass of fresh viscous lava that has been accumulating on the summit crater.
The extruded lava dome is currently about 3,600 ft (1,090 m) wide detected on 30 August in comparison with parameters from 19 August (2,800 ft (860 m) as reported by the Alaska Volcano Observatory (AVO).
A series of small earthquakes have been detected over the last week which might be related as a response to the extrusive eruption at the volcano.
There is no indication of how long the lava effusion will continue during the current eruption and it is possible that explosive activity could occur with little or no warning.
An impressive series of high-resolution satellite radar (SAR) images of the lava dome growing process from 25 July to 27 August have been published by Simon Plank from German Aerospace Center (DLR) as visible in the GIF animation below.
Source: Alaska Volcano Observatory volcano activity update 4 September 2021
GIF animation of the lava dome growing during the last month (source: Simon Plank/German Aerospace Center)
Gif of the lava dome growing @ Great Sitkin, seen in a series of high-res satellite radar (SAR) images Jul 25-Aug 27 27, 2021. The dome grew from ~90 m to ~1000 m across. Images: Simon Plank (German Aerospace Center, DLR). TerraSAR-X/TanDEM-X © DLR e.V. 2019. pic.twitter.com/kFyeuuklHJ— Alaska AVO (@alaska_avo) September 3, 2021