Washington’s Mount Rainier has entered an unusual 72‑hour tremor phase, prompting global headlines about “America’s deadliest volcano.” Here’s what is actually happening, what scientists are saying, and what it means for people in the Seattle–Tacoma region. What Just Happened at Mount Rainier? For three straight days, Washington’s Mount Rainier has been shaking with a continuous, high‑energy seismic “hum” that volcanologists describe as a 72‑hour volcanic tremor phase rather than a typical earthquake swarm. The News International According to reports drawing on data from the Pacific Northwest Seismic Network (PNSN), seismometers on Rainier’s west flank have logged nearly nonstop signals since