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Images related to Cascades Volcano Observatory.

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Mount St. Helens with a swarm of news trucks during the October, 20...
Mount St. Helens with swarm of news trucks during Oct., 2004 activity
Mount St. Helens with swarm of news trucks during Oct., 2004 activity
Mount St. Helens with swarm of news trucks during Oct., 2004 activity

Mount St. Helens with a swarm of news trucks during the October, 2004 increase in activity.

Crater and 1980-1986 dome of Mount St. Helens with the glacier on t...
Crater and 1980-1986 dome of Mount St. Helens with the glacier on t...
Crater and 1980-1986 dome of Mount St. Helens with the glacier on t...
Crater and 1980-1986 dome of Mount St. Helens with the glacier on t...

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...
Dome inside the crater of Mount St. Helens, with the 2004 "welt" in...
Dome inside the crater of Mount St. Helens, with the 2004 "welt" in...
Dome inside the crater of Mount St. Helens, with the 2004 "welt" in...

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.

Crater and 1980-86 lava dome of Mount St. Helens, ash covered areas...
Crater and 1980-86 lava dome of Mount St. Helens, ash covered areas...
Crater and 1980-86 lava dome of Mount St. Helens, ash covered areas...
Crater and 1980-86 lava dome of Mount St. Helens, ash covered areas...

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.

Mount St. Helens dome and jumbled glacier from the south. October 2...
Mount St. Helens dome and jumbled glacier from the south. Oct. 2005
Mount St. Helens dome and jumbled glacier from the south. Oct. 2005
Mount St. Helens dome and jumbled glacier from the south. Oct. 2005

Mount St. Helens dome and jumbled glacier from the south. October 2005

Beginning of plume above Mount St. Helens dome, as seen from Johnst...
Beginning of plume above Mount St. Helens dome
Beginning of plume above Mount St. Helens dome
Beginning of plume above Mount St. Helens dome

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...
Sunset on the crater rim and flanks of Mount St. Helens
Sunset on the crater rim and flanks of Mount St. Helens
Sunset on the crater rim and flanks of Mount St. Helens

Sunset on the crater rim and flanks of Mount St. Helens, with Mount Adams in the distance.

Ash, erupted from the early phases of the 2004 Mount St. Helens act...
Ash, erupted from the early phases of the 2004 Mount St. Helens act...
Ash, erupted from the early phases of the 2004 Mount St. Helens act...
Ash, erupted from the early phases of the 2004 Mount St. Helens act...

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 crater and dome as seen from the northeast. To the...
Mount St. Helens crater and dome as seen from NE. to right of the d...
Mount St. Helens crater and dome as seen from NE. to right of the d...
Mount St. Helens crater and dome as seen from NE. to right of the d...

Mount St. Helens crater and dome as seen from the northeast. To the right of the dome, the snout (nose or leading edge) of Crater Glacier is visible. October 2005

Mount St. Helens crater and dome as seen from the northeast. To the right of the dome, the snout (nose or leading edge) of Crater Glacier is visible. October 2005

Mount St. Helens dome as seen from above the southwestern crater ri...
Mount St. Helens dome as seen from above the SWern crater rim. Ash ...
Mount St. Helens dome as seen from above the SWern crater rim. Ash ...
Mount St. Helens dome as seen from above the SWern crater rim. Ash ...

Mount St. Helens dome as seen from above the southwestern crater rim. Ash from the plume of 10-01-04 is visible on the glacier at the base of the dome. The vent from that event is visible at the base of the dome on the right. October 2005

Mount St. Helens dome as seen from above the southwestern crater rim. Ash from the plume of 10-01-04 is visible on the glacier at the base of the dome. The vent from that event is visible at the base of the dome on the right. October 2005

Mount St. Helens dome and jumbled glacier from the south. October 2...
Mount St. Helens dome and jumbled glacier from the south. Oct. 2005
Mount St. Helens dome and jumbled glacier from the south. Oct. 2005
Mount St. Helens dome and jumbled glacier from the south. Oct. 2005

Mount St. Helens dome and jumbled glacier from the south. October 2005

South side of Mount St. Helens lava dome, glacier
South side of Mount St. Helens lava dome, glacier
South side of Mount St. Helens lava dome, glacier
South side of Mount St. Helens lava dome, glacier

South side of Mount St. Helens lava dome, glacier (cracked snowy surface in foreground at base of dome) is being uplifted due to increase in activity. October 2, 2005

South side of Mount St. Helens lava dome, glacier (cracked snowy surface in foreground at base of dome) is being uplifted due to increase in activity. October 2, 2005

1980-1986 Mount St. Helens' dome and glacier uplift (cracked gray s...
1980-1986 Mount St. Helens' dome and glacier uplift (cracked gray s...
1980-1986 Mount St. Helens' dome and glacier uplift (cracked gray s...
1980-1986 Mount St. Helens' dome and glacier uplift (cracked gray s...

1980-1986 Mount St. Helens' dome and glacier uplift (cracked gray surface in snow to left of main dome) from the east, before steam and ash eruption.

1980-1986 Mount St. Helens' dome and glacier uplift (cracked gray surface in snow to left of main dome) from the east, before steam and ash eruption.

Plume within Mount St. Helens' crater, October 1, 2004 at 12:03:23 ...
Plume within Mount St. Helens' crater, Oct. 1, 2004 at 12:03:23 PDT
Plume within Mount St. Helens' crater, Oct. 1, 2004 at 12:03:23 PDT
Plume within Mount St. Helens' crater, Oct. 1, 2004 at 12:03:23 PDT

Plume within Mount St. Helens' crater, October 1, 2004 at 12:03:23 PDT.

Plume within Mount St. Helens' crater, October 1, 2004 at 12:03:32 ...
Plume within Mount St. Helens' crater, Oct. 1, 2005
Plume within Mount St. Helens' crater, Oct. 1, 2005
Plume within Mount St. Helens' crater, Oct. 1, 2005

Plume within Mount St. Helens' crater, October 1, 2004 at 12:03:32 PDT.

Plume/crater image of Mount St. Helens October 1, 2004 at 12:03:55 ...
Plume/crater image of Mount St. Helens Oct. 1, 2005
Plume/crater image of Mount St. Helens Oct. 1, 2005
Plume/crater image of Mount St. Helens Oct. 1, 2005

Plume/crater image of Mount St. Helens October 1, 2004 at 12:03:55 PDT.

Plume/crater image of Mount St. Helens October 1, 2004 at 12:08:38 ...
Plume/crater image of Mount St. Helens Oct. 1, 2004 at 12:08:38 PDT
Plume/crater image of Mount St. Helens Oct. 1, 2004 at 12:08:38 PDT
Plume/crater image of Mount St. Helens Oct. 1, 2004 at 12:08:38 PDT

Plume/crater image of Mount St. Helens October 1, 2004 at 12:08:38 PDT.

Plume/crater image of Mount St. Helens October 1, 2004 at 12:13 PDT...
Plume/crater image of Mount St. Helens Oct. 1, 2004 at 12:13 PDT.
Plume/crater image of Mount St. Helens Oct. 1, 2004 at 12:13 PDT.
Plume/crater image of Mount St. Helens Oct. 1, 2004 at 12:13 PDT.

Plume/crater image of Mount St. Helens October 1, 2004 at 12:13 PDT.

Plume within Mount St. Helens' crater, October 1, 2004 at 12:16 PDT...
Plume within Mount St. Helens' crater, Oct. 1, 2004 at 12:16 PDT.
Plume within Mount St. Helens' crater, Oct. 1, 2004 at 12:16 PDT.
Plume within Mount St. Helens' crater, Oct. 1, 2004 at 12:16 PDT.

Plume within Mount St. Helens' crater, October 1, 2004 at 12:16 PDT.

Plume from Johnston Ridge Observatory, Mount St. Helens. October 1,...
Plume from Johnston Ridge Observatory, Mount St. Helens. Oct 1, 2005
Plume from Johnston Ridge Observatory, Mount St. Helens. Oct 1, 2005
Plume from Johnston Ridge Observatory, Mount St. Helens. Oct 1, 2005

Plume from Johnston Ridge Observatory, Mount St. Helens. October 1, 2004.

Mount St. Helens' crater, dome, and glacier uplift from the southea...
Mount St. Helens' crater, dome, and glacier uplift
Mount St. Helens' crater, dome, and glacier uplift
Mount St. Helens' crater, dome, and glacier uplift

Mount St. Helens' crater, dome, and glacier uplift from the southeast, after steam and ash eruption.

Mount St. Helens' crater, dome, and glacier uplift from the southeast, after steam and ash eruption.