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Thursday, 2 July 2020

A scientific expedition to the South Sandwich Islands

Earlier this year, volcanologist Emma Liu and colleagues went on a scientific voyage to the South Sandwich Islands to conduct a field study of the volcanoes and measure the volcanic gas emissions from Zavodovski, Candlemas, Saunders, and Bellingshausen islands.

You can read more detail about the expedition in this link here: https://blogs.egu.eu/divisions/gmpv/2020/03/04/five-hundred-miles-from-civilisation-exploring-active-volcanism-in-the-south-sandwich-islands/

Meanwhile, here is a small selection of pics (used with permission) she took during the expedition.

Summit crater of Mount Curry, Zavodovski Island.

Lucifer Hill and the lava fields on the north side of Candlemas Island.

Mount Michael emitting a gas plume, Saunders Island.

The crater rim of Basilisk Peak on Bellingshausen Island.

Sunday, 8 March 2020

Recent activity on Saunders Island

Gas plumes have been present on Mount Michael in three recent images from 2nd February, 20th February, and 8th March 2020.

Gas plume drifting SW during 2nd February 2020. SOURCE: Sentinel-2/Sentinel Hub.

Plume drifting from north-northwest to east during 20th February 2020. SOURCE: Sentinel-2/Sentinel Hub. 

Plume drifting west-northwest to north during 8th March 2020. SOURCE: Sentinel-2/Sentinel Hub.

Two strong earthquakes hit the South Sandwich Islands

Two strong earthquakes have recently occurred in the South Sandwich Islands. The first one with a magnitude of 6.1 occurred on the 20th January 2020 at 06:51 UTC. The epicenter of the quake was reported to be about 25km south-southeast of Bristol Island with a depth of 93km. The second one with a magnitude of 6.0 occurred on the 8th February 2020 at 14:32 UTC. The epicenter of the quake was reported to be about 113km south-southeast of Bristol Island with a depth of 16km.

6.1 magnitude earthquake on 20th January 2020. SOURCE: USGS.

6.0 magnitude earthquake on 8th February 2020. SOURCE: USGS.

Sunday, 2 February 2020

Possible lava lake on Michael Volcano?

Satellite image from 30th January 2020 shows a cresent shape-like thermal anomaly inside the summit crater of Michael Volcano which looks possibly partially obscured by a gas plume suggesting that a possible lava lake or pool could be present.

Thermal anomaly inside the crater of Mount Michael on 30th January. SOURCE: Sentinel-2/Sentinel Hub.

Tuesday, 31 December 2019

Three thermal anomalies inside the crater of Michael Volcano

Satellite image from 24th December 2019 shows three anomalies present inside the summit crater of Mount Michael, Saunders Island. It is an indicator that the volcano is pretty much active and that there maybe currently 3 active vents present on the crater floor. Images from 29th November and 2nd December 2019 also show similar anomalies suggesting that the volcano became active sometime in November.

Thermal anomaly present inside the crater of Mount Michael on 24th December. SOURCE: Sentinel-2/Sentinel Hub.

Thermal anomaly present inside the crater of Mount Michael on 2nd December. SOURCE: Sentinel-2/Sentinel Hub.

Thermal anomaly present inside the crater of Mount Michael on 29th November. SOURCE: Sentinel-2/Sentinel Hub.

Wednesday, 16 October 2019

Extensive gas plume from Saunders Island

Satellite image from the 10th October 2019 shows an extensive white plume being emitted from Michael Volcano on Saunders Island and being blown in an east-southeasterly direction. There is no thermal anomaly present in the summit crater area which brings me to the opinion that it is just a gas plume.

Further images of Saunders Island from the 13th and 15th October 2019 show nothing more than degassing activity on Michael Volcano.

Extensive gas plume drifting ESE on 10th October 2019. SOURCE: Sentinel-2/Sentinel Hub.
Degassing activity on 13th October 2019. SOURCE: Sentinel-2/Sentinel Hub.
Degassing activity on 15th October 2019. SOURCE: Sentinel-2/Sentinel Hub.

Tuesday, 15 October 2019

Few more photos of the South Sandwich Islands volcanoes

Some of you may or may not recall a post I done earlier this year showing photos of the South Sandwich Islands volcanoes taken by a scientist on board the Discovery Expedition 99 voyage to South Georgia Island and the South Sandwich Islands.

Well this is a kind of belated post but another scientist, Chris Darby who was also aboard the same expedition that time had also gave me kind permission to share his pics.

All photos taken by Chris Darby, late February to early March 2019.

ZAVODOVSKI ISLAND



SAUNDERS ISLAND




THULE ISLAND