It is a part of a volcanic ring of fire so vast that it encircles the Pacific Ocean.
Mount St. Helens is most notorious for its catastrophic eruption on May 18, 1980, at 8:32 a.m. PDT, the deadliest and most economically destructive volcanic event in the history of the United States. Mount St. Helens is 34 miles (55 km) west of Mount Adams, in the western part of the Cascade Range. These sister and brother volcanic mountains are approximately 50 miles (80 km) from Mount Rainier, the highest of Cascade volcanoes. Mount St. Helens (8,364 feet, 9,677 feet before May 18, 1980) is located in southwestern Washington about 50 miles northeast of Portland, Oregon, and is one of several lofty volcanic peaks that dominate the Cascade Range of the Pacific Northwest. On May 18, 1980, the bulge on Mount St. Helens north flank slide away in a huge landslide which covered 23 square miles north and west of the volcano, and buried 14 miles of the North Fork Toutle River Valley to an average depth of 150 feet, with a maximum depth of 600 feet. It is 96 miles (154 km) south of Seattle, Washington, and 50 miles (80 km) northeast of Portland, Oregon. Mount St. Helens takes its English name from the British diplomat Lord St Helens, a friend of explorer George Vancouver who made a survey of the area in the late 18th century. Mount St. Helens is 34 miles (55 km) west of Mount Adams, in the western part of the Cascade Range. These sister and brother volcanic mountains are approximately 50 miles (80 km) from Mount Rainier, the highest of Cascade volcanoes. PORTLAND, Ore. — Mount St. Helens is a part of a volcanic ring of fire so vast that it encircles the Pacific Ocean. Indeed, the other 12 major volcanoes in the Cascade Range of northern California, Oregon and Washington state lie within this geological phenomenon as well.  The Bay of Fires (indigenous name: larapuna) is a bay on the northeastern coast of Tasmania in Australia, extending from Binalong Bay to Eddystone Point. The bay was given its name in 1773 by Captain Tobias Furneaux in Adventure, who saw the fires of Aboriginal people on the beaches. A wide range of activities can be pursued in the Bay of Fires area, including camping, beach activities, boating, bird watching, fishing, swimming, surfing and walking. St. Helens, Oregon ... St. Helens, Oregon, is a deep-water seaport, and is located at Columbia River Mile (RM) 86, eighteen miles upstream of Rainier, Oregon, and just downstream of where the Multnomah Channel merges into the Columbia River. The community lies within the Scappoose Bay watershed. Across the river from St. Helens is Sand Island, and on the Washington side the mouth of the Lewis River enters the Columbia a mile upstream. Lewis and Clark passed through the area in 1805 and referred to the rocky clifts on which would eventually border the town of St. Helens. Washington State has its St. Helens town also, and, like St. Helens, Oregon, it too is named after Mount St. Helens. Nineteen miles northeast of Castle Rock, Washington (located on the Cowlitz River) is located the small community of Saint Helens, Washington. Across the river from St. Helens is Sand Island, and on the Washington side the mouth of the Lewis River enters the Columbia a mile upstream. Lewis and Clark passed through the area in 1805 and referred to the rocky clifts on which would eventually border the town of As with most other volcanoes in the Cascade Range, Mount St. Helens is a large eruptive cone consisting of lava rock interlayered with ash, pumice, and other deposits. The mountain includes layers of basalt and andesite through which several domes of dacite lava have erupted. Mount St. Helens is 34 miles (55 km) west of Mount Adams, in the western part of the Cascade Range. These sister and brother volcanic mountains are approximately 50 miles (80 km) from Mount Rainier, the highest of Cascade volcanoes. By Amanda Briney. Mount St. Helens is an active volcano located in the United States' Pacific Northwest region. It is about 96 miles (154 km) south of Seattle, Washington and 50 miles (80 km) northeast of Portland, Oregon. Mount St. Helens is a part of the Cascade Mountain Range which runs from northern California through Washington and Oregon and into British Columbia, Canada. 
https://en.wikipedia.org/wiki/Mount_St._Helens http://volcanoes.usgs.gov/observatories/cvo/Historical/LewisClark/Info/summary_mount_st_helens.shtml https://en.wikipedia.org/wiki/Mount_St._Helens http://www.nbcnews.com/id/6152440/ns/technology_and_science-science/t/st-helens-part-volcanic-ring-fire/ https://en.wikipedia.org/wiki/Bay_of_Fires http://columbiariverimages.com/Regions/Places/st_helens_oregon.html http://columbiariverimages.com/Regions/Places/st_helens_oregon.html https://en.wikipedia.org/wiki/Mount_St._Helens http://geography.about.com/od/hazardsanddisasters/a/mountsthelens.htm
why is st helens called bay of fire