Preliminary database of Quaternary vents in Alaska

The Alaska Volcano Observatory (AVO) uses an informal set of names for about 140 'volcanoes.' Some names refer to large, complex volcanic centers, while others indicate only a specific cone. This publication expands the list of 140 named volcanoes to include all volcanic vents where magma has reached the surface over the past 2.6 million years. This database of all known (published, or unpublished with permission) Quaternary volcanic vents was developed to better describe the nature and character of Quaternary volcanism in Alaska and specifically to aid in the discussion of spatial and temporal patterns of Alaska volcanism. This list is a preliminary starting point, and we hope that it is updated and expanded by...

Tags: Adak Quadrangle, Alaska Peninsula, Aleutian Islands, Amukta Quadrangle, Atka Quadrangle, All tags... Baird Inlet Quadrangle, Bendeleben Quadrangle, Candle Quadrangle, Chignik Quadrangle, Cold Bay Quadrangle, Cook Inlet, Craig Quadrangle, Fairbanks Quadrangle, False Pass Quadrangle, Gareloi Island Quadrangle, Goodnews Bay Quadrangle, Gulkana Quadrangle, Hazards, Healy Quadrangle, Hooper Bay Quadrangle, Iliamna Quadrangle, Karluk Quadrangle, Kenai Quadrangle, Ketchikan Quadrangle, Kiska Quadrangle, Kotzebue Quadrangle, Kwiguk Quadrangle, Lake Clark Quadrangle, Marshall Quadrangle, McCarthy Quadrangle, Mount Katmai Quadrangle, Nabesna Quadrangle, Naknek Quadrangle, Nunivak Island Quadrangle, Petersburg Quadrangle, Port Moller Quadrangle, Pribilof Islands Quadrangle, Rat Islands Quadrangle, Saint Lawrence Quadrangle, Saint Michael Quadrangle, Samalga Island Quadrangle, Seguam Quadrangle, Selawik Quadrangle, Seward Peninsula, Sitka Quadrangle, Southeast Alaska, Stepovak Bay Quadrangle, Sutwik Island Quadrangle, Tanacross Quadrangle, Tyonek Quadrangle, Ugashik Quadrangle, Umnak Quadrangle, Unalakleet Quadrangle, Unalaska Quadrangle, Unimak Quadrangle, Valdez Quadrangle, Volcanic Eruption, Volcanoes, Volcanology, Wrangell Mountains, geoscientificInformation, Fewer tags

Tsunami inundation maps of Sitka, Alaska

The purpose of this study is to evaluate potential tsunami hazards for the community of Sitka. We numerically modeled the extent of inundation from tsunami waves generated by near- and far-field tectonic sources. We performed numerical modeling of historic events at Sitka, such as the tsunami triggered by the 1964 Great Alaska Earthquake, and the tsunami waves generated by the recent 2011 Tohoku and 2012 Haida Gwaii earthquakes. Hypothetical tsunami scenarios include variations of the extended 1964 rupture, megathrust earthquakes in the Alaska Peninsula region and in the Cascadia subduction zone, and a thrust earthquake in the region of the Queen Charlotte-Fairweather fault zone. Results of numerical modeling combined...

Tags: Active Fault, Alaska Earthquake 1964, Alaska, State of, Baranof Island, Bathymetry, All tags... Coastal, Coastal and River, Earthquake, Emergency Preparedness, Engineering, Engineering Geology, Faulting, Faults, Flood, Geologic Hazards, Geology, Hazards, Inundation, Japonski Island, Modeling, Seismic Hazards, Sitka, Sitka Quadrangle, Sitka Sound, Southeast Alaska, Tides, Tsunami, geoscientificInformation, Fewer tags

Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from Kook Lake, Sitka Quadrangle, Alaska

This report and digital data release presents 26 new geochemical analyses on historic U.S. Bureau of Mines (USBM) samples, including 4 rock, 9 stream sediment, 3 soil, and 10 heavy mineral concentrate (pan concentrate) samples. These samples were originally collected by the USBM to investigate rare-earth-element occurrences associated with the Kook Lake intrusive complex, Sitka Quadrangle, Alaska. Historic USBM sample materials were retrieved by DGGS from the DGGS Geologic Materials Center (GMC), where the USBM samples were transferred as part of the federally funded Minerals Data and Information Rescue in Alaska (MDIRA) program in the late 1990s and early 2000s. The text and analytical data and tables associated...

Tags: Analyses and Sampling, Base Metals, Critical Minerals, Economic Geology, Economic Study, All tags... Exploration, Geochemical Surveys, Geochemistry, Geology, Heavy Metals, Mineral Assessment, Mineral Deposit, Mineral Development, Mineral Localities, Mineral Prospect, Mineral Resources, Minerals, Non-Metals, Platinum Group Elements, Precious Metals, Rare Earth Elements, Ree, Resource Assessment, Resource Information, Resources, Sitka Quadrangle, Strategic Minerals, Strategic and Critical Minerals Assessment Project, Trace Elements, Trace Geochemical, Trace Metals, geoscientificInformation, Fewer tags