Spirit Lake is a lake in Skamania County, Washington, United States, located north of Mount St. Helens. It was a popular tourist destination for many years until Mount St. Helens erupted in 1980.

The Spirit Lake Stage is subdivided into six eruptive periods—the Smith Creek, Pine Creek, Castle Creek, Sugar Bowl, Kalama, and Goat Rocks Eruptive Periods. This map, originally produced by the U.S. Geological Survey in 1919, shows the …

Spirit Lake before the big May 18, 1980, eruption of Mount St. Helenes. View from the south. Mount Rainier, is in the distance.

2010年5月20日 · Mount St. Helens Pictures: Before and After the Blast. From snow-capped peak to smoldering crater, see how the major eruption 30 years ago today changed the face of the famous volcano.

How were lakes affected by the eruption? Prior to the eruption, Spirit Lake and other lakes were typical cold, clear mountain lakes (low nutrients, productivity and temperature with high clarity).

Spirit Lake Stage (3.9 ka to present) The bulk of the pre–1980 edifice of Mount St. Helens (above about 1,800 m or 6,000 ft) was constructed during the Spirit Lake Stage, which includes the most complex part of the eruptive history.

Spirit Lake was completely displaced by the debris avalanche before rushing back to a lakebed raised 200 feet. Its once pristine waters were transformed into a bubbling bacterial brew. Before the 1980 eruption, Spirit Lake was surrounded by old-growth forests. USFS / Jim Hughes.