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Larry Mastin

Hydrologist

Contact Info


Short Biography

EDUCATION

9/84-7/88     Geomechanics Program, Stanford University, Ph.D. July 1988

9/81-6/84     Engineering Geology Program, Stanford University, M.S., June 1984

4/78-6/80     Geology Department, University of California, Davis, B.S. (cum Laude), June 1980



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Publications

Mastin, L. G., A. R. Van Eaton, and J. B. Lowenstern (2014), Modeling ash fall distribution from a Yellowstone supereruption, Geochemistry, Geophysics, Geosystems, n/a-n/a, doi:10.1002/2014GC005469. [Link]

Mastin, L. G. (2014), Testing the accuracy of a 1-D volcanic plume model in estimating mass eruption rate, Journal of Geophysical Research: Atmospheres, 119(5), 2013JD020604, doi:10.1002/2013JD020604. [Link]

Mastin, L. G., H. Schwaiger, D. J. Schneider, K. L. Wallace, J. Schaefer, and R. P. Denlinger (2013). Injection, transport, and deposition of tephra during event 5 at Redoubt Volcano, 23 March, 2009, J. Volcanol. Geotherm. Res. 259(1), pp. 201-213. [Link]

Schwaiger, H. F., R. P. Denlinger, and L. G. Mastin (2012), Ash3d: A finite-volume, conservative numerical model for ash transport and tephra deposition, J. Geophys. Res., 117(B4), B04204. [Link]

Mastin, L. G., M. Lisowski, E. Roeloffs, and N. M. Beeler (2009), Improved constraints on the estimated size and volatile content of the Mount St. Helens magma system from the 2004-2008 history of dome growth and deformation, Geophys. Res. Lett., 36(L20304), doi:10.1029/2009GL039863. [Link]

Mastin, L. G., et al. (2009), A multidisciplinary effort to assign realistic source parameters to models of volcanic ash-cloud transport and dispersion during eruptions, J. Volcanol. Geotherm. Res., 186(1–2), 10-21. [Link]

Mastin LG (2007) A user-friendly one-dimensional model for wet volcanic plumes. Geochemistry, Geophysics, Geosystems 8(Q03014):doi:10.1029/2006GC001455 [Link]




Mastin, L. G., O. Spieler, and W. S. Downey (2009), An experimental study of hydromagmatic fragmentation through energetic, non-explosive magma-water mixing, Journal of Volcanology and Geothermal Research, 180, 161-170.

Mastin, L. G. (2007), The generation of fine hydromagmatic ash by growth and disintegration of glassy rinds, Journal of Geophysical Research112, doi:10.1029/2005JB003883.

Mastin, L. G. (2005), The controlling effect of viscous dissipation on magma flow in silicic conduits,Journal of Volcanology and Geothermal Research143, 17-28.

Mastin, L. G. (2002), Insights into volcanic conduit flow from an open-source numerical model,Geochemistry, Geophysics, Geosystems3, 10.1029.

Mastin, L. G. (1997), Evidence for water influx from a caldera lake during the explosive hydromagmatic eruption of 1790, Kilauea Volcano, Hawaii, Journal of Geophysical Research102, 20093-20109.

Mastin, L. G. (1995), Thermodynamics of gas and steam-blast eruptions, Bulletin of Volcanology57, 85-98.




                           

My Science Topics


Science Topic
Subtopic
Natural Hazardshazards
Natural Hazardsvolcanic activity
Natural Hazardsvolcanoes



My USGS Science Strategy Areas

A National Hazard, Risk, and Resilience Assessment Program

Physics of explosive eruptions

I am interested in the physical processes that control the size, duration, and violence of volcanic eruptions.  Those processes range widely, and include the mechanical deformation of magma bodies, the dynamics of magma flow through eruptive conduits, the breakup or "fragmentation" of magma when it mixes with water, and the rise and dispersal of tephra in volcanic plumes and ash clouds.

I have studied these processes through analysis of geodetic data, mapping and sampling of volcanic tephra, development of numerical models that simulate flow in volcanic conduits, jets,  tephra plumes, and ash clouds; and experiments of water-magma mixing processes and of jet dynamics.  Many of these studies have been carried out through collaborations with colleagues in the USGS and academia.

Since about 2007 I have focussed on the hazards to aviation of volcanic plumes and ash clouds.  Together with USGS colleagues we are developing and testing the  model Ash3d, which is being used to forecast the atmospheric transport and deposition of tephra during volcanic eruptions.


Contact Information

Larry Mastin
1300 SE Cardinal Court Bldg. 10
Vancouver, WA 98683
lgmastin@usgs.gov
360-993-8925
360-993-8980 - Fax
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