Gravity traverses in the Valley of Ten Thousand Smokes, Katmai National Monument, Alaska

Abstract

Three structural sections across the pyroclastic flow of the 1912 Mount Katmai eruption in the Valley of Ten Thousand Smokes were derived drom gravity data. Minimum average ash flow thicknesses of 40, 45. and 30 meters were deduced for profiles across the main, the south, and the southeast branches of the valley, respectively. The total volume of the ash flow is estimated to be 3.8 to 4.7 km3.