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Images related to Cascades Volcano Observatory.
Step Channel and Loowit Channel merge on the Pumice Plain. Spirit Lake is visible on the upper right. The yellowish-green color on the surface is plant growth.
Step Channel and Loowit Channel merge on the Pumice Plain. Spirit Lake is visible on the upper right. The yellowish-green color on the surface is plant growth.
The dark "muddy" looking area in the right foreground is old erosional debris flows from Step Channel (on right) over the years. The lighter ribbon of grey to the left of the darker area is a lahar from Loowit Channel from early morning of October 6, 2004. The yellowish-green color on the surface is plant growth.
The dark "muddy" looking area in the right foreground is old erosional debris flows from Step Channel (on right) over the years. The lighter ribbon of grey to the left of the darker area is a lahar from Loowit Channel from early morning of October 6, 2004. The yellowish-green color on the surface is plant growth.
Debris flow within Loowit Channel that originated from Mount St. Helens.
Debris flow within Loowit Channel that originated from Mount St. Helens.
View from the east side of Mount St. Helens dome looking at the uplift of the glacier and south flank of the lava dome.
View from the east side of Mount St. Helens dome looking at the uplift of the glacier and south flank of the lava dome.
FLIR (forward looking infrared monitoring instrument) mounted on nose of helicopter with Mount St. Helens in the background.
FLIR (forward looking infrared monitoring instrument) mounted on nose of helicopter with Mount St. Helens in the background.
Mount St. Helens with a swarm of news trucks during the October, 2004 increase in activity.
Mount St. Helens with a swarm of news trucks during the October, 2004 increase in activity.
Mount St. Helens' crater, October 2004, aerial view from the east.
Mount St. Helens' crater, October 2004, aerial view from the east.
Dome and glacier within Mount St. Helens's crater, October 2004, aerial view from the northwest.
Dome and glacier within Mount St. Helens's crater, October 2004, aerial view from the northwest.
Ash plume and crater rim at Mount St. Helens, October 2004, aerial view from the south.
Ash plume and crater rim at Mount St. Helens, October 2004, aerial view from the south.
Crater rim and ash from October 2004 Mount St. Helens plume.
Crater rim and ash from October 2004 Mount St. Helens plume.
Ash plume and crater rim at Mount St. Helens, October 2004, aerial view.
Ash plume and crater rim at Mount St. Helens, October 2004, aerial view.
Dome and glacier within Mount St. Helens crater, October 2004, aerial view from the south.
Dome and glacier within Mount St. Helens crater, October 2004, aerial view from the south.
Dome within Mount St. Helens' crater, aerial view from the east.
Dome within Mount St. Helens' crater, aerial view from the east.
Crater and 1980-86 lava dome of Mount St. Helens, ash covered areas are grey, and new vent is the depression in lower center of photograph. Spirit Lake is in the background. View toward the north.
Crater and 1980-86 lava dome of Mount St. Helens, ash covered areas are grey, and new vent is the depression in lower center of photograph. Spirit Lake is in the background. View toward the north.
Beginning of plume above Mount St. Helens dome, as seen from Johnston Ridge Observatory.
Beginning of plume above Mount St. Helens dome, as seen from Johnston Ridge Observatory.
Sunset on the crater rim and flanks of Mount St. Helens, with Mount Adams in the distance.
Sunset on the crater rim and flanks of Mount St. Helens, with Mount Adams in the distance.
Crater and 1980-1986 dome of Mount St. Helens with the glacier on the right. View toward the south.
Crater and 1980-1986 dome of Mount St. Helens with the glacier on the right. View toward the south.
Dome inside the crater of Mount St. Helens, with the 2004 "welt" in a darker grey shade at the south edge (top in this photo) of the lighter colored 1980-86 dome. Aerial view toward the south.
Dome inside the crater of Mount St. Helens, with the 2004 "welt" in a darker grey shade at the south edge (top in this photo) of the lighter colored 1980-86 dome. Aerial view toward the south.
Mount St. Helens dome and jumbled glacier from the south. October 2005
Mount St. Helens dome and jumbled glacier from the south. October 2005
Ash, erupted from the early phases of the 2004 Mount St. Helens activity, is remobilized from the surface of an ash-covered from a moving vehicle.
Ash, erupted from the early phases of the 2004 Mount St. Helens activity, is remobilized from the surface of an ash-covered from a moving vehicle.
Mount St. Helens dome and jumbled glacier from the south. October 2005
Mount St. Helens dome and jumbled glacier from the south. October 2005