#MSH45 | June 12/13, 1980 | Eruption #3
St. Helens does it again—once again while hidden.
Harmonic tremor rose through the afternoon—just like before the May 25 eruption. A spike around 7 p.m. was followed by a column of ash.
Then, another surge at 9. A 50,000-foot plume launches into the night.
