Mount St. Helens: Instrumentation and Dome Growth, Nov-Dec 2004

By late October 2004, a whaleback-shaped extrusion of solid lava (called a spine) emerged from Mount St. Helens' crater floor. The 2004–2008 lava dome grew by continuous extrusion of degassed lava spines that had mostly solidified at less than 1 km (0.62 mi) beneath the surface. Scientists deployed monitoring equipment and made visual observations to assess the hazards from the eruption during November 20 to December 3, 2004.

1. 2004 Dome and Surrounding Area of Deformation; November 20, 2004 (00:16)
2. Sling Deployment of Seismic Instrument (NED) onto NE Side of 1986 Dome; November 20, 2004  (00:48)
3. Sling Deployment of Seismic Instrument (ELEA) on Top of 2004 Dome; November 20, 2004  (03:28)
4. Forward Looking Infrared (FLIR) Thermal Imaging of 2004 Dome and Surrounding Area of Deformation; November 20, 2004  (05:00)
5. 2004 Dome and Surrounding Area of Deformation; November 29, 2004  (06:00)
6. Forward Looking Infrared (FLIR) Thermal Imaging of 2004 Dome and Surrounding Area of Deformation; November 29, 2004  (12:00)
7. 2004 Dome and Surrounding Area of Deformation; December 16, 2004 (16:08)
8. Forward Looking Infrared (FLIR) Thermal Imaging of 2004 Dome and Surrounding Area of Deformation; November 20, 2004 (21:28)
9. Digital Flyby of 2004 Dome; November 29, 2004  (37:53)
10. Time-lapse Photography of Dome Growth, October 10 to December 03, 2004 (41:07)