Mystery Bulge in Oregon Still Growing

This type of bulging is one of the key indicators of some form of volcanic activity. Most of the Cascades volcanic mountains are candidates for eruption. St. Helens continues to percolate, and this recent finding indicates activity in the vicinity of the Three Sisters volcanic formation(s).

Bulge as viewed using radar interferometry.

A recent survey of a bulge that covers about 100 square miles near the South Sister indicates the area is still growing, suggesting it could be another volcano in the making or a major shift of molten rock under the center of the Cascade Range.

This site is remote enough to probably not be a disaster, even if it erupts, but it’s still something neat enough to keep some track of.