Studies Inside a New System of Glaciovolcanic Caves in the Crater of Mount St. Helens

It has been 40 years since the destruction of May 18, 1980. In the years since, a natural laboratory has sprung forth from the devastation and Mount St. Helens is now one of the most intensively studied volcanoes on Earth. Episodic unrest in the crater between 1980 and 1986 brought forth a new series of lava domes that grew to 350 meters tall. Another period of unrest started in September 2004, when a second lava-dome-building eruption initiated in the crater.