Sunday, 17 August 2014

Weak thermal hotspots on two islands

The thermal imagery of 16th August 2014 shows some weak heat sources on Montagu and Bristol islands. On Montagu Island, a weak heat source is present on Mount Belinda Volcano. But on Bristol Island, 2 weak heat sources are present on Mount Sourabaya and a crater-like structure between Mount Sourabaya and Mount Wales at the centre of the island. The image in normal colour did not reveal anything unusual, but thermal imagery from 12th May 2014 showed the heat sources in exactly the same spots except that they were weaker. So this indicates that the temperature of the heat sources had recently slightly elevated but overall, the heat sources indicate either steady fumarolic activity or elevated ground temperatures in the craters.

Meanwhile on Saunders Island, degassing activity is present on Mount Michael as of 16th August 2014.

Slight heat source on Mount Belinda. SOURCE: Landsat 8/USGS/NASA.

Slight heat sources present on Bristol Island. SOURCE: Landsat 8/USGS/NASA.

Steam plume present on Mount Michael. SOURCE: Landsat 8/USGS/NASA.

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