St. Helens lava stirring, suggesting new eruption

Lava is moving inside Mt. St. Helens again, setting off low-level harmonic tremors that could be the prelude to renewed volcanic activity, scientists say. A buildup in the tremors occurred before the volcano's three major eruptions on May 18, May 25, and June 12.

of 5 stories this month > Get unlimited stories
You've read 5 of 5 free stories

Only $1 for your first month.

Get unlimited Monitor journalism.