ashfall blankets lecture #7 fall 2009 ashfall class
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AVO Photo: Kate Bull Redoubt ashfall. Ashfall Blankets Lecture #7 Fall 2009 Ashfall Class. Anchorage ashfall from Crater Peak/Spurr 1992 (AVO photo). 1992 Crater Peak Spurr AVO photos. MODIS 12 May 2008 Chaiten fallout blanket. Bonadonna & Houghton, 2005, BV 67: 441-456. - PowerPoint PPT PresentationTRANSCRIPT
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Ashfall Blankets Lecture #7 Fall 2009 Ashfall Class
AVO Photo: Kate BullRedoubt ashfall
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Anchorage ashfall from Crater Peak/Spurr 1992 (AVO photo)
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1992 Crater Peak SpurrAVO photos
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MODIS 12 May 2008 Chaiten fallout blanket
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Bonadonna & Houghton, 2005, BV 67: 441-456
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Bonadonna & Houghton, 2005, BV 67: 441-456
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Bonadonna & Houghton, 2005, BV 67: 441-456
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Bonadonna & Houghton, 2005, BV 67: 441-456
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Overall the Fuego subplinian eruptions have only a few percent of the fine mode, which appears to come from the pyroclastic flow milling. Larger plinian eruptions likely have a much higher proportion of co-PF ash.
Rose et al., 2007 BV, in press
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Fine mode is located to WNW, while the bulk of the coarse ash is W to WSW
HYSPLIT shows that 4 km winds are to WNW while winds at 8-12 km are W and WSW
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Voronoi TesselationBonadonna & Houghton, 2005
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Crater Peak/Spurr, Sept 1992Andesite, Sub-plinian
Total GSD
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