Electron Lahar

The Electron Lahar, also known as the Electron Mudflow, was a lahar in the U.S. state of Washington that descended from the summit and sunset amphitheater on Mount Rainier about 500 years ago. It was named after the unincorporated community of Electron.

The extent of the Electron mudflow was about 55 km from Mount Rainier. It covered approximately 13 sqmi in the Puyallup Valley, and was more than 26 ft thick at its deepest point.