Hazel has developed and championed the use of microgravity as a tool for monitoring active volcanoes. She has used this method to identify sub-surface processes at calderas in a state of unrest and at persistently active volcanoes and this has given geoscientists considerable insight into the range of mechanisms responsible for initiating and sustaining volcanic activity. The technique Hazel pioneered is now the standard method for gravity monitoring on volcanoes; it remains the only way to quantify the sub-surface mass changes that occur before, during and after eruptions.
John Stix has studied active volcanoes for 26 years, specializing in volcanic gases, eruption mechanisms, and the impact of volcanic activity. He teaches undergraduate and graduate courses in volcanology, natural hazards, and environmental geology. He also is involved in field courses, where he exposes students to hands-on observations of natural processes such as volcanic eruptions and floods. He has been involved in many training courses and workshops in Canada, the US, and Latin America to teach volcanology. He has collaborated extensively with colleagues in Colombia, Costa Rica, Nicaragua, and Ecuador in volcano studies and volcanic hazards. From 2003 to 2010 he was the Editor-in-Chief of the Bulletin of Volcanology, the leading international journal related to the study of volcanoes and volcanism. He is currently part of an international team to drill into an active silicic magma body beneath Krafla volcano in Iceland.Part I. Origin and Transport of Magma 1. Melting the Earth's Upper Mantle Timothy L. Grove and Christy B. Till 2. Migration of Melt Martha J. Daines and Matej Pec 3. Plate Tectonics and Volcanism Peter C. LaFemina 4. The Composition and Origin of Magmas Nick Rogers 5. Thermodynamic and Transport Properties of Silicate Melts and Magma Charles E. Lesher and Frank J. Spera 6. Chemical Thermodynamics and the Study of Magmas Mark S. Ghiorso and Guilherme A.R. Gualda 7. Volatiles in Magmas Paul J. Wallace, Terry Plank, Marie Edmonds and Erik H. Hauri 8. Magma Chambers Bruce D. Marsh 9. Rates of Magma Ascent and Storage Brandon Browne and Lindsay Szramek 10. Magma Transport in Dikes Helge Gonnermann and Benoit Taisne 11. Magma Ascent and Degassing at Shallow Levels Alain Burgisser and Wim Degruyter
Part II. Eruptions 12. Earth's Volcanoes and Their Eruptions: An Overview Lee Siebert, Elizabeth Cottrell, Edward Venzke and Benjamin Andrews 13. Sizes of Volcanic Eruptions David M. Pyle 14. Global Rates of Volcanism and Volcanic Episodes Natalia Irma Deligne and Haraldur Sigurdsson 15. Primary Volcanic Landforms Shan de Silva and Jan M. Lindsay 16. Calderas Michael Branney and Valerio Acocella
Part III. Effusive Volcanism 17. Lava Flows and Rheology Andrew J.L. Harris and Scott K. Rowland 18. Lava Dome Eruptions Eliza S. Calder, Yan Lavallée, Jackie E. Kendrick and Marc Bernstein 19. Submarine Lavas and Hyaloclastite James D.L. White, Jocelyn McPhie, and S. Adam Soule 20. Glaciovolcanism Benjamin R. Edwards, Magnu´s T. Gudmundsson and James K. Russell 21. Mid-Ocean Ridge Volcanism S. Adam Soule 22. Seamounts and Island Building Hubert Staudigel and Anthony A.P. Koppers 23. Basaltic Volcanic Fields Greg A. Valentine and Charles B. Connor 24. Large Igneous Provinces and Flood Basalt Volcanism Stephen Self, Millard F. Coffin, Michael R. Rampino and John A. Wolff
Part IV Explosive Volcanism 25. Magmatic Fragmentation Katharine V. Cashman and Bettina Scheu 26. Magma-Water Interaction and Phreatomagmatic Fragmentation Bernd Zimanowski, Ralf Büttner, Pierfrancesco Dellino, James D.L. White and Kenneth H. Wohletz 27. Hawaiian and Strombolian Eruptions Jacopo Taddeucci, Marie Edmonds, Bruce Houghton, Michael R. James and Sylvie Vergniolle 28. Vulcanian Eruptions Amanda Bachtell Clarke, Tomaso Esposti Ongaro and Alexander Belousov 29. Plinian and Subplinian Eruptions Raffaello Cioni, Marco Pistolesi and Mauro Rosi 30. Phreatomagmatic and Related Eruption Styles Bruce Houghton, James D.L. White and Alexa R. Van Eaton 31. Submarine Explosive Eruptions James D.L. White, C. Ian Schipper and Kazuhiko Kano 32. Volcanic Plumes Steven Carey and Marcus Bursik 33. Tephra Dispersal and Sedimentation Costanza Bonadonna, Antonio Costa, Arnau Folch and Takehiro Koyaguchi 34. Pyroclastic Fall Deposits Bruce F. Houghton and Rebecca J. Carey 35. Pyroclastic Density Currents: Processes and Models Josef Dufek, Tomaso Esposti Ongaro and Olivier Roche 36. Deposits of Pyroclastic Density Currents Richard J. Brown and Graham D.M. Andrews 37. Lahars and Their Deposits James W. Vallance and Richard M. Iverson 38. Landslides, Debris Avalanches and Volcanic Gravitational Deformation Benjamin van Wyk de Vries and Tim Davies
Part V Extraterrestrial Volcanism 39. Volcanism on the Moon Paul D. Spudis 40. Volcanism on Mercury James W. Head, III and Lionel Wilson 41. Volcanism on Mars James R. Zimbelman, William Brent Garry, Jacob Elvin Bleacher and David A. Crown 42. Volcanism on Venus Mikhail A. Ivanov, Larry S. Crumpler, Jayne C. Aubele and James W. Head, III 43. Volcanism on Io Rosaly M.C. Lopes and David A. Williams 44. Cryovolcanism in the Outer Solar System Paul Geissler
Part VI Volcanic Interactions 45. Volcanic, Magmatic and Hydrothermal Gases Tobias P. Fischer and Giovanni Chiodini 46. Intrusion-Related Geothermal Systems James Stimac, Fraser Goff and C