REPORT:
A Volcano Rekindled: The Renewed Eruption of Mount St. Helens, 2004-2006

Table of Contents

• Chapter 1: Overview of the 2004 to 2006, and Continuing, Eruption of Mount St. Helens, Washington, by William E. Scott, David R. Sherrod, and Cynthia A. Gardner

• Chapter 2: Seismicity Associated with Renewed Dome Building at Mount St. Helens, 2004–2005, by Seth C. Moran, Stephen D. Malone, Anthony I. Qamar, Weston A. Thelen, Amy K. Wright, and Jacqueline Caplan-Auerbach

• Chapter 3: Near-Real-Time Information Products for Mount St. Helens—Tracking the Ongoing Eruption, by Anthony I. Qamar, Stephen D. Malone, Seth C. Moran, William P. Steele, and Weston A. Thelen

• Chapter 4: Absolute and Relative Locations of Earthquakes at Mount St. Helens, Washington, Using Continuous Data: Implications for Magmatic Processes, by Weston A. Thelen, Robert S. Crosson, and Kenneth C. Creager

• Chapter 5: Broadband Characteristics of Earthquakes Recorded During a Dome-Building Eruption at Mount St. Helens, Washington, Between October 2004 and May 2005, by Stephen P. Horton, Robert D. Norris, and Seth C. Moran

• Chapter 6: Seismicity and Infrasound Associated with Explosions at Mount St. Helens, 2004–2005, by Seth C. Moran, Patrick J. McChesney, and Andrew B. Lockhart

• Chapter 7: Seismic-Monitoring Changes and the Remote Deployment of Seismic Stations (Seismic Spider) at Mount St. Helens, 2004–2005, by Patrick J. McChesney, Marvin R. Couchman, Seth C. Moran, Andrew B. Lockhart, Kelly J. Swinford, and Richard G. LaHusen

• Chapter 8: Use of Digital Aerophotogrammetry to Determine Rates of Lava Dome Growth, Mount St. Helens, Washington, 2004–2005, by Steve P. Schilling, Ren A. Thompson, James A. Messerich, and Eugene Y. Iwatsubo

• Chapter 9: Growth of the 2004–2006 Lava-Dome Complex at Mount St. Helens, Washington, by James W. Vallance, David J. Schneider, and Steve P. Schilling

• Chapter 10: Photogeologic Maps of the 2004–2005 Mount St. Helens Eruption, by Trystan M. Herriott, David R. Sherrod, John S. Pallister, and James W. Vallance

• Chapter 11: Remote Camera Observations of Lava Dome Growth at Mount St. Helens, Washington, October 2004 to February 2006, by Michael P. Poland, Daniel Dzurisin, Richard G. LaHusen, Jon J. Major, Dennis Lapcewich, Elliot T. Endo, Daniel J. Gooding, Steve P. Schilling, and Christine G. Janda

• Chapter 12: Extrusion Rate of the Mount St. Helens Lava Dome Estimated from Terrestrial Imagery, November 2004–December 2005, by Jon J. Major, Cole G. Kingsbury, Michael P. Poland, and Richard G. LaHusen

• Chapter 13: Effects of Lava-Dome Growth on the Crater Glacier of Mount St. Helens, Washington, by Joseph S. Walder, Steve P. Schilling, James W. Vallance, and Richard G. LaHusen

• Chapter 14: Constraints and Conundrums Resulting from Ground-Deformation Measurements Made During the 2004–2005 Dome-Building Eruption of Mount St. Helens, Washington, by Daniel Dzurisin, Michael Lisowski, Michael P. Poland, David R. Sherrod, and Richard G. LaHusen

• Chapter 15: Analysis of GPS-Measured Deformation Associated with the 2004–2006 Dome-Building Eruption of Mount St. Helens, Washington, by Michael Lisowski, Daniel Dzurisin, Roger P. Denlinger, and Eugene Y. Iwatsubo

• Chapter 16: Instrumentation in Remote and Dangerous Settings; Examples Using Data from GPS “Spider” Deployments During the 2004–2005 Eruption of Mount St. Helens, Washington, by Richard G. LaHusen, Kelly J. Swinford, Matthew Logan, and Michael Lisowski

• Chapter 17: Use of Thermal Infrared Imaging for Monitoring Renewed Dome Growth at Mount St. Helens, 2004, by David J. Schneider, James W. Vallance, Rick L. Wessels, Matthew Logan, and Michael S. Ramsey

• Chapter 18: Radar Interferometry Observations of Surface Displacements During Pre- and Coeruptive Periods at Mount St. Helens, Washington, 1992–2005, by Michael P. Poland and Zhong Lu

• Chapter 19: From Dome to Dust: Shallow Crystallization and Fragmentation of Conduit Magma During the 2004–2006 Dome Extrusion of Mount St. Helens, Washington, by Katharine V. Cashman, Carl R. Thornber, and John S. Pallister

• Chapter 20: Frictional Properties of the Mount St. Helens Gouge, by Peter L. Moore, Neal R. Iverson, and Richard M. Iverson

• Chapter 21: Dynamics of Seismogenic Volcanic Extrusion Resisted by a Solid Surface Plug, Mount St. Helens, 2004–2005, by Richard M. Iverson

• Chapter 22: Constraints on the Size, Overpressure, and Volatile Content of the Mount St. Helens Magma System from Geodetic and Dome-Growth Measurements During the 2004–2006+ Eruption, by Larry G. Mastin, Evelyn Roeloffs, Nick M. Beeler, and James E. Quick

• Chapter 23: Managing Public and Media Response to a Reawakening Volcano: Lessons from the 2004 Eruptive Activity of Mount St. Helens, by Peter M. Frenzen and Michael T. Matarrese

• Chapter 24: Hazard Information Management During the Autumn 2004 Reawakening of Mount St. Helens Volcano, Washington, by Carolyn L. Driedger, Christina A. Neal, Tom H. Knappenberger, Deborah H. Needham, Robert B. Harper, and William P. Steele

• Chapter 25: Pre- and Post-Eruptive Investigations of Gas and Water Samples from Mount St. Helens, Washington, 2002 to 2005, by Deborah Bergfeld, William C. Evans, Kenneth A. McGee, and Kurt R. Spicer

• Chapter 26: Emission Rates of CO2, SO2, and H2S, Scrubbing, and Preeruption Excess Volatiles at Mount St. Helens, 2004–2005, by Terrence M. Gerlach, Kenneth A. McGee, and Michael P. Doukas

• Chapter 27: Chlorine Degassing During the Lava Dome-Building Eruption of Mount St. Helens, 2004–2005, by Marie Edmonds, Kenneth A. McGee, and Michael P. Doukas

• Chapter 28: The Pleistocene Eruptive History of Mount St. Helens, Washington, from 300,000 to 12,800 Years Before Present, by Michael A. Clynne, Andrew T. Calvert, Edward W. Wolfe, Russell C. Evarts, Robert J. Fleck, and Marvin A. Lanphere

• Chapter 29: Identification and Evolution of the Juvenile Component in 2004–2005 Mount St. Helens Ash, by Michael C. Rowe, Carl R. Thornber, and Adam J.R. Kent

• Chapter 30: Petrology of the 2004–2006 Mount St. Helens Lava Dome—Implications for Magmatic Plumbing and Eruption Triggering, by John S. Pallister, Carl R. Thornber, Katharine V. Cashman, Michael A. Clynne, Heather A. Lowers, Charles W. Mandeville, Isabelle K. Brownfield, and Gregory P. Meeker

• Chapter 31: Magmatic Conditions and Processes in the Storage Zone of the 2004–2006 Mount St. Helens Dacite, by Malcolm J. Rutherford and Joseph D. Devine III

• Chapter 32: Chemistry, Mineralogy, and Petrology of Amphibole in Mount St. Helens 2004–2006 Dacite, by Carl R. Thornber, John S. Pallister, Heather A. Lowers, Michael C. Rowe, Charles W. Mandeville, and Gregory P. Meeker

• Chapter 33: Evolving Magma Storage Conditions Beneath Mount St. Helens Inferred from Chemical Variations in Melt Inclusions from the 1980–1986 and Current (2004–2006) Eruptions, by Jon Blundy, Katharine V. Cashman, and Kim Berlo

• Chapter 34: Plagioclase Populations and Zoning in Dacite of the 2004–2005 Mount St. Helens Eruption: Constraints for Magma Origin and Dynamics, by Martin J. Streck, Cindy A. Broderick, Carl R. Thornber, Michael A. Clynne, and John S. Pallister

• Chapter 35: Trace Element and Pb Isotope Composition of Plagioclase from Dome Samples from the 2004–2005 Eruption of Mount St. Helens, Washington, by Adam J.R. Kent, Michael C. Rowe, Carl. R. Thornber, and John S. Pallister

• Chapter 36: 238U-230Th-226Ra Disequilibria in Dacite and Plagioclase from the 2004–2005 Eruption of Mount St. Helens, by Kari M. Cooper and Carrie T. Donnelly

• Chapter 37: Timing of Degassing and Plagioclase Growth in Lavas Erupted from Mount St. Helens, 2004–2005, from 210Po-210Pb-226Ra Disequilibria, by Mark K. Reagan, Kari M. Cooper, John S. Pallister, Carl R. Thornber, and Matthew Wortel

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