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Monitoring Remote Volcanoes

Explore the causes and signals of deformation at remote volcanoes from 1992 to 1999, courtesy of Amelung, Jonsson, Zebker, and Segall (Nature, 2000). Learn about submarine eruptions, lateral intrusions, vesicle segregation, and trapdoor fault deflation. Discover the continuous network monitoring data from the eruption events in 2005, 2009, and beyond, offering insights into magma supply, faulting, feedback mechanisms, and dike formation. Dive into the fascinating world of Cerro Azul and Fernandina volcanoes, including remote wilderness and inhabited areas, and study the complexities of volcanic processes.

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Monitoring Remote Volcanoes

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  1. Monitoring Remote Volcanoes By Deformation

  2. 1992-1999 Courtesy of Amelung, Jonsson, Zebker, and Segall (Nature, 2000)

  3. Causes of Deflation • Submarine eruption • Should cause deformation signal • Lateral intrusion • Should cause deformation signal • Vesicle segregation • Should cause densification = gravity signal • Drainback

  4. Continuous Network

  5. October 20, 2005 Eruption April 16, 2005 Trap Door Fault Deflation Accelerating Inflation Cerro Azul Transient October 20, 2005 Eruption Decelerating Inflation

  6. Accelerating Inflation

  7. Trapdoor Fault

  8. GV06

  9. October 23, 2005

  10. Eruption

  11. Continuous Network 2005 Lava

  12. Decelerating Recovery

  13. Before After Upper balloon will inflate at decelerating rates Poiselle Flow 4 r P Q = 8L

  14. Cerro Azul Transient

  15. Cerro Azul Event Eruption Start Eruption End

  16. 2009 Model +40.1 cm/y

  17. Deflation Inflation Eruption

  18. Conclusions • Intrusion is forming by unsteady but continual supply of magma. • Feedback between faulting of the roof, eruption, and resupply. • Feedback between pressure, volume, and degassing. • Dikes do not form along faults!

  19. Fernandina Extremely remote: Largest wilderness tropical island in the world Sierra Negra Inhabited and developed

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