Environmental assessment of 1991 Hudson volcano eruption ashfall effects on southern Patagonia region, Argentina
The August 1991 eruption of the Hudson volcano in the southern Andean volcanic zone affected an area of 1000 km in radius to the east in the Argentine Patagonic meseta. The thickness of ash ranged from 20 cm in the Andean area to less than 1 mm in the Atlantic coast zone. Wind storms reactivated the...
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1995
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09430105_v25_n2_p119_Inbar http://hdl.handle.net/20.500.12110/paper_09430105_v25_n2_p119_Inbar |
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paper:paper_09430105_v25_n2_p119_Inbar2023-06-08T15:53:37Z Environmental assessment of 1991 Hudson volcano eruption ashfall effects on southern Patagonia region, Argentina Argentina Ashfall effects Volcano eruption ashfall volcanic eruption Argentina, Patagonia, Hudson Volcano The August 1991 eruption of the Hudson volcano in the southern Andean volcanic zone affected an area of 1000 km in radius to the east in the Argentine Patagonic meseta. The thickness of ash ranged from 20 cm in the Andean area to less than 1 mm in the Atlantic coast zone. Wind storms reactivated the ash deposits, together with terrigenous material, more than one year after the eruption. In order to assess the potential risk of the ash, analyses of concentration, size, mineralogical composition, toxic elements, and irritating effects of gases were performed. In all samples, the percentage of particles of the 2-to 5-μm range is below the toxic threshold level. Trace elements are below the toxic threshold concentration for humans and animals. The major impact of the ashfall was on sheep herds; about one third of them were lost in the areas close to the volcano. Soil incorporated the ash layers, and a fast recovery of orchards was reported two years later. Rivers were loaded with sediment in the immediate aftermath, but one year later returned to previous conditions. Along the shores of the Buenos Aires Lake, a fresh tephra layer can be distinguished. © 1995 Springer-Verlag. 1995 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09430105_v25_n2_p119_Inbar http://hdl.handle.net/20.500.12110/paper_09430105_v25_n2_p119_Inbar |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Ashfall effects Volcano eruption ashfall volcanic eruption Argentina, Patagonia, Hudson Volcano |
| spellingShingle |
Argentina Ashfall effects Volcano eruption ashfall volcanic eruption Argentina, Patagonia, Hudson Volcano Environmental assessment of 1991 Hudson volcano eruption ashfall effects on southern Patagonia region, Argentina |
| topic_facet |
Argentina Ashfall effects Volcano eruption ashfall volcanic eruption Argentina, Patagonia, Hudson Volcano |
| description |
The August 1991 eruption of the Hudson volcano in the southern Andean volcanic zone affected an area of 1000 km in radius to the east in the Argentine Patagonic meseta. The thickness of ash ranged from 20 cm in the Andean area to less than 1 mm in the Atlantic coast zone. Wind storms reactivated the ash deposits, together with terrigenous material, more than one year after the eruption. In order to assess the potential risk of the ash, analyses of concentration, size, mineralogical composition, toxic elements, and irritating effects of gases were performed. In all samples, the percentage of particles of the 2-to 5-μm range is below the toxic threshold level. Trace elements are below the toxic threshold concentration for humans and animals. The major impact of the ashfall was on sheep herds; about one third of them were lost in the areas close to the volcano. Soil incorporated the ash layers, and a fast recovery of orchards was reported two years later. Rivers were loaded with sediment in the immediate aftermath, but one year later returned to previous conditions. Along the shores of the Buenos Aires Lake, a fresh tephra layer can be distinguished. © 1995 Springer-Verlag. |
| title |
Environmental assessment of 1991 Hudson volcano eruption ashfall effects on southern Patagonia region, Argentina |
| title_short |
Environmental assessment of 1991 Hudson volcano eruption ashfall effects on southern Patagonia region, Argentina |
| title_full |
Environmental assessment of 1991 Hudson volcano eruption ashfall effects on southern Patagonia region, Argentina |
| title_fullStr |
Environmental assessment of 1991 Hudson volcano eruption ashfall effects on southern Patagonia region, Argentina |
| title_full_unstemmed |
Environmental assessment of 1991 Hudson volcano eruption ashfall effects on southern Patagonia region, Argentina |
| title_sort |
environmental assessment of 1991 hudson volcano eruption ashfall effects on southern patagonia region, argentina |
| publishDate |
1995 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09430105_v25_n2_p119_Inbar http://hdl.handle.net/20.500.12110/paper_09430105_v25_n2_p119_Inbar |
| _version_ |
1768542184530771968 |