All volcanoes in the Cascade Range of Washington and Oregon are at normal background levels of activity this week. Current Volcano Alert Level: NORMAL Current Aviation Color Code: GREEN Weekly Update: https://on.doi.gov/2hwAiRm The spectacular eruption of Mount St. Helens on May 18, 1980, electrified scientists and the public. The colossal landslide, northward-directed blast, and eruption column made news worldwide. Reconnaissance of the devastation spurred efforts to understand the power and aw

Keep hiking along the Naches Loop Trail, and you'll start to notice chunks of dark granite scattered throughout the green bedrock. Where did that magma come from, and how old is it compared to Mount Rainier? | Cascade PBS