New Lava Dome

new lava dome

This photo shows a newly formed lava dome on Mount Cleveland in the Aleutian Range of southwest Alaska. Magma is reaching the surface and cooling in a circular pattern; not that you’d want to go for a stroll there – the lava temperatures are in a range of 550-600 Celsius (1000-1100 Fahrenheit).
The larger circle, with the darker material, is the oldest part of the lava dome at just a few days old. If you look closely, you can see rings and radial fractures within the circle. The smaller circle of material in the middle is the youngest part of the dome, which has not cooled as much yet. As the new magma forces its way out, it pushes the existing lava away from the center, creating the rings and radial fractures.
Cleveland has been experiencing sporadic minor eruptions since its last major eruption in 2001. The most recent explosion (at time of writing) was on August 6, but it was small and no ash was observed. Some steam was seen a few days later. Observation of Cleveland is difficult because the mountain is often obscured by clouds, and no one lives on the island.
Cleveland is a 1730 meter (5676 foot) stratovolcano on Chuginadak Island in the Bering Sea. It is one of the most active of the approximately 75 volcanoes above a subduction zone where the Pacific Plate is being forced under the North American Plate.
Scientists warn that the eruptions are likely to continue and more explosions may occur without warning. If a larger eruption occurs, it could disrupt air travel. Source EarthStory

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