On what date did the 1980 eruption of Mount St. Helens, in which "Crater Glacier" was formed, occur?
Crater Glacier The Crater Glacier (also known as Tulutson Glacier) is a geologically young glacier that is located on Mount St. Helens, in the U.S. state of Washington. The glacier formed after the 1980 Eruption and due to its location, the body of ice grew rapidly, unknown to the public for nearly 20 years. The glacier once contained ice caves in the smooth ice before the 2004-2008 volcanic activity. The growth of the lava dome and volcanic eruptions from 2004 to 2008 significantly altered the appearance of the glacier. In the same time period, several agencies decided to put an official name on the glacier which, at first, was Tulutson Glacier. A later decision made Crater Glacier the official glacier name. Despite the volcanic activity, the glacier continued to advance and by mid-2008, the glacier completely encircled the lava domes. In addition, new glaciers (rock or ice) have formed around Crater Glacier as well.
Symphony No. 50 (Hovhaness) Symphony No. 50, Op. 360, Mount St. Helens is a three-movement orchestral composition by the American composer Alan Hovhaness. The symphony was commissioned by former Hovhaness publisher C.F. Peters and was completed January 24, 1982. It premiered March 2, 1984, and was performed by the San Jose Symphony under conductor George Cleve. The piece commemorates the volcano Mount St. Helens, culminating in the events of its 1980 eruption, which Hovhaness had witnessed from his Seattle home.