RSI Photos » Mount St. Helens – Volcano

Eruption Plume (October 5, 2004)

R. Scott Ireland — Tue, 16 Apr 2013 00:37:38 +0000

Subject: Eruption Plume Following an Ash and Gas Eruption
Date: October 5, 2004
Location: Mount St. Helens, Washington
Notes: In early October, 2004, Mount St. Helens re-awakened with a series of eruptions and formation of a new lava dome. This is the third of three total eruptions. The dark plumes are ash; lighter plumes are volcanic gases (water vapor, sulphur dioxide and carbon dioxide). Note the extent of the plume, driven by predominant west to east winds.

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Hummocks and Avalanche Debris

R. Scott Ireland — Tue, 16 Apr 2013 00:35:46 +0000

Subject: Hummocks and Avalance Debris from the 1980 Eruption
Location: Mount St. Helens, Washington

Pyroclastic Deposits

R. Scott Ireland — Tue, 16 Apr 2013 00:34:39 +0000

Subject: Massive Pyroclastic Deposits from the 1980 Eruption
Location: Mount St. Helens, Washington
Notes: Note the blown-down trees still there 21 years after the eruption.

Ash and Gas Eruption

R. Scott Ireland — Tue, 16 Apr 2013 00:33:01 +0000

Subject: Ash and Gas Eruption
Date: October 4, 2004
Location: Mount St. Helens, Washington
Notes: In early October, 2004, Mount St. Helens re-awakened with a series of eruptions and formation of a new lava dome. This is the second of three total eruptions. The dark plumes are ash; lighter plumes are volcanic gases (water vapor, sulphur dioxide and carbon dioxide).

Ash and Gas Eruption 1 (October 4, 2004)

R. Scott Ireland — Tue, 16 Apr 2013 00:30:05 +0000

Ash Eruption 1 (October 4, 2004)

R. Scott Ireland — Tue, 16 Apr 2013 00:28:36 +0000

Ash and Gas Eruption 2 (October 4, 2004)

R. Scott Ireland — Tue, 16 Apr 2013 00:27:15 +0000

Ash and Gas Eruption 4 (October 4, 2004)

R. Scott Ireland — Tue, 16 Apr 2013 00:26:16 +0000

Lahar (Mudflow) Deposits – Toutle River

R. Scott Ireland — Tue, 16 Apr 2013 00:24:00 +0000

Subject: Lahar (Mudflow) Deposits – Toutle River
Location: Mount St. Helens, Washington

Tree Blow-Down Area

R. Scott Ireland — Tue, 16 Apr 2013 00:21:57 +0000

Subject: Tree Blow-Down Area, from the 1980 Eruption
Location: Mount St. Helens, Washington
Notes: Trees felled by a massive pyroclastic flow when the Volcano erupted in 1980.