Item talk:Q47819
From geokb
orcid:
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usgs_staff_profile:
meta: status_code: 200 timestamp: '2023-09-30T16:52:17.582715' url: https://www.usgs.gov/staff-profiles/larry-g-mastin profile: abstracts: - "2021: \u201CComparing the hazards of wildfire smoke and volcanic ash in the\ \ Pacific Northwest\u201D, invited talk in the Cascadia Wildfire and Urban Smoke\ \ seminar series, sponsored by Portland State University and the Cascadia Innovation\ \ Corridor Iniative (search for it on YouTube)" - "2020: \u201CProtecting air travel from volcanic ash in the coming decade\u201D\ , invited talk V08-15 at 2020 American Geophysical Union Fall Meeting." - "2016: \u201CForecasting Ashfall Impacts from a Yellowstone Supereruption\u201D\ , USGS Menlo Park Public Lecture, May 26, 2016, https://www.usgs.gov/media/videos/forecasting-ashfall-impacts-a-yellowstone-supereruption" affiliations: - Fellow, Geological Society of America - Member, American Geophysical Union - Member, International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) - Member, American Meteorological Society - Member, American Association education: - 1988 Ph.D. Geomechanics, Stanford University - 1984 M.S. Engineering Geology, Stanford University - 1980 B.S. Geology, University of California, Davis (cum Laude) email: lgmastin@usgs.gov expertise_terms: - Volcanic Ash Hazards - Explosive Eruptions - Ash and Aviation - Volcanic Ash Clouds - Volcanic Ash honors: - '2018: Fellow, Geological Society of America' intro_statements: - I have spent much of my career working to understand, assess, and mitigate the hazards of volcanic ash. name: Larry G. Mastin, Ph.D. name_qualifier: null orcid: 0000-0002-4795-1992 organization_link: https://www.usgs.gov/observatories/cvo organization_name: Cascades Volcano Observatory personal_statement: "To understand the nature of the hazard, I have studied tephra\ \ deposits in the field and designed experiments to generate volcanic ash in\ \ the laboratory. I also develop and use models that simulate the ascent of\ \ magma in conduits, rise of ash in volcanic plumes, and downwind movement of\ \ ash clouds. I have been involved in the development and application of several\ \ models that simulate these processes.I have worked with emergency managers,\ \ Volcanic Ash Advisory Centers, and specialists from more than a dozen volcano\ \ observatories around the world to improve the accuracy of volcanic ash forecasts,\ \ both for aviation safety and for ground-based communities. From 2010-2020\ \ I served as co-chair of the World Meteorological Organization\u2019s Volcanic\ \ Ash Scientific Advisory Group, an expert panel dedicated to advising Volcanic\ \ Ash Advisory Centers on the science and practice of volcanic ash-cloud detection\ \ and forecasting.My professional life began as a mud logger working on the\ \ North Slope of Alaska in 1980-81. While studying for my master\u2019s degree\ \ at Stanford in 1982-84, I worked part time for the Tectonophysics branch of\ \ the USGS in Menlo Park, California, where I assisted with hydraulic fracturing\ \ stress measurements, and studied the growth of fractures and the development\ \ of breakouts, i.e. stress-induced zones of failure, around boreholes in sandstone.My\ \ Ph.D. work at Stanford, from 1984-1988, under Professor David Pollard, involved\ \ field and laboratory study of the growth of surface faults above a shallow\ \ dike in Long Valley Caldera, California. A second half of this study focused\ \ on how the dike heated groundwater that erupted to produce several large explosion\ \ craters, the Inyo Craters, north of the town of Mammoth Lakes.After completing\ \ my Ph.D., I worked from 1988-1990 as a post-doctoral researcher in the Geophysics\ \ Institute at the University of Karlsruhe, Germany. My tasks included compiling\ \ data for the European part of a World Stress Map project, and examining the\ \ state of stress at a deep drillhole site in northern Bavaria.At the Cascades\ \ Volcano Observatory, from 1990 through the late 2000s, I concentrated on the\ \ role of water in the style and timing of eruptions. This work involved, for\ \ example, an examination of correlations between rainfall and gas explosions\ \ at Mount St. Helens; on the conditions that produced explosive phreatomagmatic\ \ eruptions at Kilauea, and effects of turbulent water-magma mixing on eruptive\ \ style.Since the late 2000s, I have been involved primarily in volcanic ash\ \ hazards, as described above." professional_experience: [] title: Physical Volcanologist
