Major eruption-induced changes to the McDonald Islands, southern Indian Ocean
The McDonald Islands (53°S, 73°E) originally comprised three small islands that lie on the Kerguelen Plateau, 44 km west of Heard Island. No volcanic activity was observed since their discovery in 1874 until 1997, when two passing ships recorded major changes and eruptive behaviour. A 2001 satellite...
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2005
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ftjamescook:oai:researchonline.jcu.edu.au:5758 2024-02-11T09:59:03+01:00 Major eruption-induced changes to the McDonald Islands, southern Indian Ocean Stephenson, Jon Budd, G.M. Manning, J. Hansbro, P. 2005-06 application/pdf https://researchonline.jcu.edu.au/5758/1/5758_Stephenson_et_al._2005.pdf unknown Cambridge University Press http://dx.doi.org/10.1017/S095410200500266X https://researchonline.jcu.edu.au/5758/ https://researchonline.jcu.edu.au/5758/1/5758_Stephenson_et_al._2005.pdf Stephenson, Jon, Budd, G.M., Manning, J., and Hansbro, P. (2005) Major eruption-induced changes to the McDonald Islands, southern Indian Ocean. Antarctic Science, 17 (2). pp. 259-266. restricted Article PeerReviewed 2005 ftjamescook https://doi.org/10.1017/S095410200500266X 2024-01-22T23:23:17Z The McDonald Islands (53°S, 73°E) originally comprised three small islands that lie on the Kerguelen Plateau, 44 km west of Heard Island. No volcanic activity was observed since their discovery in 1874 until 1997, when two passing ships recorded major changes and eruptive behaviour. A 2001 satellite image showed that the main island had doubled its area. This paper reports observations made from a cruise ship in November 2002, supplemented by a high-resolution satellite image acquired in March 2003. A new volcanic complex comprises lava domes, spines and flows, all assumed to be phonolitic, similar to the older volcanic rocks. The complex shows dormant volcanic activity, with numerous fumaroles, recent spine evolution and lava flows. Changes in relative sea level have connected Flat and McDonald Islands. A spit about 1km long with extensive shoals beyond, now extends eastward from McDonald Island and presents new hazards to shipping. Biological changes include colonization by king penguins (Aptenodytes patagonica), previously absent, and a large reduction in numbers of formerly widespread macaroni penguins (Eudyptes chrysolophus chrysolophus). Article in Journal/Newspaper Antarctic Science Aptenodytes patagonica Eudyptes chrysolophus Heard Island King Penguins McDonald Islands James Cook University, Australia: ResearchOnline@JCU Heard ENVELOPE(73.510,73.510,-53.117,-53.117) Heard Island Heard Island ENVELOPE(73.510,73.510,-53.117,-53.117) Indian Kerguelen Main Island ENVELOPE(-38.220,-38.220,-54.007,-54.007) McDonald Island ENVELOPE(72.600,72.600,-53.050,-53.050) McDonald Islands ENVELOPE(72.600,72.600,-53.033,-53.033) Antarctic Science 17 2 259 266 |
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Open Polar |
collection |
James Cook University, Australia: ResearchOnline@JCU |
op_collection_id |
ftjamescook |
language |
unknown |
description |
The McDonald Islands (53°S, 73°E) originally comprised three small islands that lie on the Kerguelen Plateau, 44 km west of Heard Island. No volcanic activity was observed since their discovery in 1874 until 1997, when two passing ships recorded major changes and eruptive behaviour. A 2001 satellite image showed that the main island had doubled its area. This paper reports observations made from a cruise ship in November 2002, supplemented by a high-resolution satellite image acquired in March 2003. A new volcanic complex comprises lava domes, spines and flows, all assumed to be phonolitic, similar to the older volcanic rocks. The complex shows dormant volcanic activity, with numerous fumaroles, recent spine evolution and lava flows. Changes in relative sea level have connected Flat and McDonald Islands. A spit about 1km long with extensive shoals beyond, now extends eastward from McDonald Island and presents new hazards to shipping. Biological changes include colonization by king penguins (Aptenodytes patagonica), previously absent, and a large reduction in numbers of formerly widespread macaroni penguins (Eudyptes chrysolophus chrysolophus). |
format |
Article in Journal/Newspaper |
author |
Stephenson, Jon Budd, G.M. Manning, J. Hansbro, P. |
spellingShingle |
Stephenson, Jon Budd, G.M. Manning, J. Hansbro, P. Major eruption-induced changes to the McDonald Islands, southern Indian Ocean |
author_facet |
Stephenson, Jon Budd, G.M. Manning, J. Hansbro, P. |
author_sort |
Stephenson, Jon |
title |
Major eruption-induced changes to the McDonald Islands, southern Indian Ocean |
title_short |
Major eruption-induced changes to the McDonald Islands, southern Indian Ocean |
title_full |
Major eruption-induced changes to the McDonald Islands, southern Indian Ocean |
title_fullStr |
Major eruption-induced changes to the McDonald Islands, southern Indian Ocean |
title_full_unstemmed |
Major eruption-induced changes to the McDonald Islands, southern Indian Ocean |
title_sort |
major eruption-induced changes to the mcdonald islands, southern indian ocean |
publisher |
Cambridge University Press |
publishDate |
2005 |
url |
https://researchonline.jcu.edu.au/5758/1/5758_Stephenson_et_al._2005.pdf |
long_lat |
ENVELOPE(73.510,73.510,-53.117,-53.117) ENVELOPE(73.510,73.510,-53.117,-53.117) ENVELOPE(-38.220,-38.220,-54.007,-54.007) ENVELOPE(72.600,72.600,-53.050,-53.050) ENVELOPE(72.600,72.600,-53.033,-53.033) |
geographic |
Heard Heard Island Heard Island Indian Kerguelen Main Island McDonald Island McDonald Islands |
geographic_facet |
Heard Heard Island Heard Island Indian Kerguelen Main Island McDonald Island McDonald Islands |
genre |
Antarctic Science Aptenodytes patagonica Eudyptes chrysolophus Heard Island King Penguins McDonald Islands |
genre_facet |
Antarctic Science Aptenodytes patagonica Eudyptes chrysolophus Heard Island King Penguins McDonald Islands |
op_relation |
http://dx.doi.org/10.1017/S095410200500266X https://researchonline.jcu.edu.au/5758/ https://researchonline.jcu.edu.au/5758/1/5758_Stephenson_et_al._2005.pdf Stephenson, Jon, Budd, G.M., Manning, J., and Hansbro, P. (2005) Major eruption-induced changes to the McDonald Islands, southern Indian Ocean. Antarctic Science, 17 (2). pp. 259-266. |
op_rights |
restricted |
op_doi |
https://doi.org/10.1017/S095410200500266X |
container_title |
Antarctic Science |
container_volume |
17 |
container_issue |
2 |
container_start_page |
259 |
op_container_end_page |
266 |
_version_ |
1790594931819020288 |