🌋 Mount Shasta: A Giant Made of Four Volcanoes At first glance, Mount Shasta looks like one massive mountain. But get closer, and you’ll find something incredible: it’s actually made up of four separate volcanoes, stacked over time by powerful eruptions. With its jagged peaks, ancient lava domes, and deep glacial scars, Shasta stands as the largest stratovolcano by volume in the entire Cascade Range. Its tallest cone, Hotlum, last erupted about 200 years ago—sending mudflows and ash down the sl

This week, all volcanoes in the Cascade Range of Washington and Oregon are at normal background levels of activity. Current Volcano Alert Level: NORMAL Current Aviation Color Code: GREEN Weekly Update: https://www.usgs.gov/programs/VHP/volcano-updates#cvo Past Week Observations: Small magnitude earthquakes were detected at Mount Baker, Mount Rainier, Mount St. Helens, and Newberry. All monitoring data are consistent with background activity levels in the Cascades Range. Field crews were at Mount