Tuesday, 30 August 2016

Possible eruption on Zavodovski

It appears an eruption may have occurred yesterday on Zavodovski Island's Mount Curry volcano. If you look at the satellite image from 29th August 2016 you will notice a plume originating from Mount Curry and drifting in a east-northeasterly direction, and has a little greyish colour in it. In my view, it's likely to be an eruption plume or at least an ash and gas emission.

What looks to be a possible eruption on Mount Curry as of 29th August 2016. SOURCE: Suomi NPP/VIIRS/NASA.

Monday, 22 August 2016

Activity update 22/8/16: Bristol Island, Saunders Island

The eruption of Mount Sourabaya on Bristol Island appears to have ended or at least is in it's dying stages. A hazy Landsat 8 image from 21st August 2016 shows nothing more than dark patches with a little bit of steaming (indicating lava flows) and a thermal image revealed that the thermal anomaly over the lava field area wasn't so strong. This could indicate that the eruption of Mount Sourabaya has either ceased or may be in it's dying stages. A faint thermal anomaly is also present inside another crater to the east of Mount Sourabaya indicating possible elevated ground temperatures.

Satellite image of Bristol Island on the 21st August. SOURCE: Landsat 8/USGS/NASA.

Thermal image of Bristol Island on the 21st August. Has the eruption ceased? SOURCE: Landsat 8/USGS/NASA.

Meanwhile over on Saunders Island, a Landsat 8 image from the 21st August 2016 shows a steam plume being emitted from the summit crater of Mount Michael and drifting in a northerly direction. There's also what appears to show an enlargement of the crater caused by the collapse of an area between the summit crater and the "Old Crater" resulting in what possibly looks to be the two craters merging into one.

Saunders Island on the 21st August. SOURCE: Landsat 8/USGS/NASA.

Sunday, 21 August 2016

Two Strong earthquakes hit South Georgia/South Sandwich Islands region

In the space of 2 days, two strong earthquakes over the magnitude of 6 has hit an area to the northwest of the East Scotia Ridge between South Georgia Island and the South Sandwich Islands. The first quake struck with a magnitude of 7.4 on the 19th August 2016 at 07:32 UTC with a depth of 10km, and then on the 21st August 2016 a second quake struck the same area with a magnitude of 6.4 at 03:45 UTC also with a depth of 10km.

7.4 magnitude earthquake on 19th August 2016. SOURCE: USGS.

6.4 magnitude earthquake on 21st August 2016. SOURCE: USGS.

Wednesday, 3 August 2016

Bristol Island update 3/8/16

Satellite images of Bristol Island from recent days did not show an ash plume but on the Landsat Viewer on the EOS Data Analytics website an infrared image from the 29th July 2016 reveals an active lava flow descending the northwest flank of Mount Sourabaya with a steam plume also being present. This is an indicator that the activity which began in late April 2016 continues. 

Because the island is partially covered in clouds it is difficult to observe the changes on the landscape.

Activity continues on Mount Sourabaya. SOURCE: Landsat Viewer/EOS Data Analytics.

Active lava flow evident on Infrared imagery. SOURCE: Landsat Viewer/EOS Data Analytics.