The volcanic Mt Rainier is grumbling. But it’s not what you think. At least not yet.

According to reports from the Seattle Times, the glaciers atop Rainier have melted to the point where they are becoming unstable. Particularly so with Tahoma Glacier which, all throughout July to mid August, has emitted large floods of muddy, ice-choked water. Tahoma sent its floods rumbling down the mountainsides, filling streams and rivers with roiling, brown outflows.

These glacier outburst floods issuing from Rainier have packed quite a punch. They’ve been strong enough to shake the earth, setting off seismographs in the region of Rainier. It’s a shaking and quaking that’s tumbled boulders down the mountainside, gouged out new flood channels and smashed great swaths of trees.

(Over recent months, the Tahoma Glacier on the southwestern face of Mt. Rainier has been issuing large flows of glacial outburst material. Those familiar with…