Item talk:Q47819

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                 with Observations from Pinatubo, Kelud, and Calbuco Volcanoes
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usgs_staff_profile:

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   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