So, That Bulge on South Sister Volcano in Oregon is Growing Again
During the 1990s, a very subtle bulge grew on the west side of South Sister, near Bend in Oregon. It stopped growing by 2002, but now 20 years later, it has started growing again.
During the 1990s, a very subtle bulge grew on the west side of South Sister, near Bend in Oregon. It stopped growing by 2002, but now 20 years later, it has started growing again.