Hi Lonni - We don't think "closing the ring" would create more pressure, as the additional "weight" of the unconsolidated deposits is extremely minimal compared to other stresses. Thank you, Cheryl Cameron -------- Lonni Clayton wrote: Since it appears that Bogoslof is closing the ring around itself, I was wondering if that would create more pressure on the top of the underwater part of the volcano' -- Cheryl Cameron Geologist, Alaska Volcano Observatory Alaska Division of Geological & Geophysical Surveys voice: 907-451-5012 fax: 907-451-5050