Mount St. Helens: Instrumentation and Dome Growth, Oct 2004-Sept 2005

Following unrest that began on September 23, 2004 and the steam and ash eruptions in early October, extrusion of solid magma typified the 2004-2008 eruption at Mount St. Helens. The magma is unusually gas poor and crystal rich.  Several meters of pulverized, variably sintered rock commonly coat the emergent lava spines, lending them a smooth appearance.  Other spines have broken apart to become surrounded by hot talus fans. Time lapse photography captures dome growth and thermal imagery tracks the temperature of emerging spines from October 2004 to September 2005.

1. Summary of Mount St. Helens Eruption and Dome Growth from October 1, 2004 through July 13, 2005  (00:13)
2. 2004-2005 Dome and Surrounding Area of Deformation. August 10, 2005  (11:33)
3. Forward Looking Infrared (FLIR) Thermal Imaging of 2004-2005 Dome.  August 10, 2005  (12:17)
4. Retrieval, Servicing and Redeployment of Petrologic “Spider” from North End of 2004-2005 Dome.  August 10, 2005  (13:01)
5. 2004-2005 Dome and Surrounding Area of Deformation. August 23, 2005  (15:19)
6. 2004-2005 Dome and Surrounding Area of Deformation. September 2, 2005  (16:50)
7. Forward Looking Infrared (FLIR) Thermal Imaging of 2004-2005 Dome.  September 2, 2005  (17:45)
8. Time Lapse Photography of South Side of 2004-2005 Dome from Dusk to Dawn. September 7, 2005  (18:54)
9. Time Lapse Photography of 2004-2005 Dome Growth. Oct. 10, 2004 through Sept. 14, 2005 (19:29)