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Augustine reported activity

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EVENT SPECIFIC INFORMATION

Event Name : Augustine 1812

Start: 1812 Observed

Lava flow: BibCard
Tephrafall: BibCard BibCard BibCard
Pyroclastic flow, surge, or nuee ardente: BibCard BibCard BibCard
Lava dome: BibCard BibCard
Tephra plume: BibCard
Central eruption: BibCard
Eruption Type:Explosive
MaxVEI: 3 BibCard

Description: From Kisslinger (1983), translating Doroshin (1870): "It was active in 1812, as was positively confirmed for me by a native of the village located on the opposite shore of Kenai Bay. It wasn't possible to land canoes on the island while the wind was blowing, because the lava, which descends into the sea in a gentle slope, could at any time tear the skin of the canoe."

Waitt and Beget (2009) state "This sparse and cryptic information suggests pyroclastic flows carrying boulder-sized pumice swept down the north and northeast flanks and into the sea. Such flows could voluminously reach down the short and steep run to water before debris avalanche added land to the coast in 1883 [see plate 1 in original text].

"Yet we identify on Augustine Island no mappable deposit definitely of 1812. At the likely focus of pyroclastic flows, north and northeast, five later eruptions also focused debris - voluminously so in 1883, 1976, and 1986. The 1883 debris avalanche deeply buried that lower volcano flank in coarse rubble and established a new coast more than 2 km beyond the old one. There's no seeing what lies below these deposits. But in our interpretation of some measured sections [see plate 2 in original text] we speculate that a thin ash below the ash layer we identify with 1883 to be 1812 ash."

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