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Monday, 12 February 2018

Thermal anomaly persists on Mount Michael

The thermal anomaly is still present inside the summit crater of Mount Michael on Saunders Island as seen in the recent satellite images from 10th February 2018. As the images were viewed on the EOSDA website, I was able to zoom in on to the summit area of Mount Michael Volcano where I had a more clearer view of the summit crater area.

A degassing plume was present but an infrared image revealed that a thermal anomaly was present in the northern part of the crater interior indicating volcanic activity. It could either be low level strombolian activity, or it could be lava flows covering a small part of the crater interior, or it could be a lava lake.

Shortwave Infrared image showing a hotspot inside the crater of Michael Volcano. SOURCE: Sentinel-2/EOS Data Analytics.

Natural colour image of the summit area of Michael Volcano. SOURCE: Sentinel-2/EOS Data Analytics.

Sunday, 4 February 2018

Thermal anomaly detected on Mount Michael

In a satellite image by Landsat 8 taken on the 31st January 2018, a thermal anomaly is present inside the summit crater of Mount Michael on Saunders Island. It is clearly an indicator that some elevated activity has been taking place inside the crater of Mount Michael.

In my opinion, I believe some low level strombolian activity has been occurring or at least a lava pool is present on the crater floor.

Activity inside the crater of Mount Michael Volcano. SOURCE: Landsat 8/USGS/NASA.

Thursday, 7 December 2017

Two plumes in the South Sandwich Islands

In the satellite images from the 4th December 2017 two plumes are present originating from Zavodovski Island and Saunders Island respectively. On Zavodovski Island a whitish plume is seen drifting northeast originating from Mount Curry, and on Saunders Island a dirty white to light grey plume originating from Mount Michael is seen drifting east-northeast to northeast. In my view the plume from Mount Curry is most likely to be a gas plume but I wouldn't rule out the possibility of some slight ash content, and the plume from Mount Michael may have some possible ash content.

Zavodovski Island on the 4th December 2017. SOURCE: Aqua/MODIS/NASA.

Saunders Island on the 4th December 2017. SOURCE: Terra/MODIS/NASA.

Saturday, 21 October 2017

Gas emission on Saunders Island

Satellite image from 15th October 2017 shows what appears to be a gas emission originating from Mount Michael on Saunders Island. Gas emissions originating from Saunders Island also showed up in satellite images from the 4th and 5th October. Possible aerosols drifting from Saunders Island showed in satellite images from 17th, 19th, and 20th October.

In my view, this is gas related which may interpret elevated activity on Michael Volcano.

Gas emission originating from Mount Michael on 15th October 2017. SOURCE: Aqua/MODIS/NASA.

Monday, 25 September 2017

Magnitude 6 earthquake in the South Sandwich Islands

A strong magnitude 6 earthquake struck in the South Sandwich Islands on the 4th September 2017 at 08:07 UTC. The epicenter of the quake was reported to be about 149km north-northeast of Bristol Island with a depth of 35km.

Magnitude 6 earthquake on 4th September 2017. SOURCE: USGS.

Sunday, 3 September 2017

Plume originating from Saunders Island

Image from 18th August 2017 shows what appears to be a gas plume originating from Mount Michael drifting in an easterly direction. In another image from 10th August, a plume containing aerosols originating from Mount Michael is seen drifting northeast.

Plume drifting northeast from Saunders Island during 10th August 2017. SOURCE: Aqua/MODIS/NASA.


Gas plume from Saunders Island during 18th August 2017. SOURCE: Terra/MODIS/NASA.

Wednesday, 9 August 2017

Pumice raft near South Sandwich Islands?

In a satellite image from 9th August 2017 I saw what appears to be a large grey patch (trending NW-SE) in the sea to the east of Zavodovski Island and to the north-northeast of Visokoi Island. This suspiciously looks like a pumice raft but I'm not 100% sure. If it is, then this means that an undersea eruption must've taken place most likely originating from Protector Shoal Volcano, an active undersea volcano located northwest of Zavodovski Island.

UPDATE 12/8/17: After seeking expert opinions, I've declared this inconclusive.

Possible Pumice raft on 9th August 2017? SOURCE: Terra/MODIS/NASA.