Mount St. Helens: Instrumentation and Dome Growth, Sept 2005-Feb 2006

Events that occurred in the crater during the 2004–2008 eruption were recorded by a network of seven remote, telemetered digital single-lens reflex (DSLR) cameras installed on the crater floor and rim. The resulting time lapse images constitute a valuable and visually compelling record of dome growth and the resulting response of Crater Glacier. The fixed cameras that telemetered images permitted visual observations and repeat images, from which rates of movement could be estimated. Digital Elevation Models (DEMs) made from a succession of vertical aerial photographs tracked volumetric rates of lava-dome growth and provided detailed bases for a variety of investigations. Throughout the eruption, helicopter-mounted FLIR surveys, a relatively new technique for USGS scientists, provided key information regarding extrusion temperature, vent location, and dome structure.

1. Forward Looking Infrared (FLIR) Thermal Imaging of 2004-2005 Dome,  September 21, 2005 (00:12)
2. Forward Looking Infrared (FLIR) Thermal Imaging of 2004-2005 Dome,  October 11, 2005  (02:23)
3. Forward Looking Infrared (FLIR) Thermal Imaging of April 2005 Spine Exposed by Collapse of Surrounding Rock,  October 11, 2005  (03:14)
4. Installation of Tiltmeter on 1980-1986 Dome, Northeast of 2004-2005 Dome, November 17,  2005 (04:08)
5. 2004-2005 Dome and Surrounding Area of Deformation, November 18, 2005  (16:20)
6. Forward Looking Infrared (FLIR) Thermal Imaging of 2004-2005 Dome, November 18, 2005  (17:47)
7. 2004-2006 Dome and Surrounding Area of Deformation, February 15, 2006  (22:31)
8. 2004-2006 Dome and Surrounding Area of Deformation Viewed from Guacamole Instrument Site, February 16, 2006  (25:16)
9. Forward Looking Infrared (FLIR) Thermal Imaging of 2004-2006 Dome, February 16, 2006  (25:58)
10. Time Lapse Photography of 2004-2005 Dome Growth Viewed from the East Crater Rim, September 15 2005 to February 12, 2006  (27:38)