Glacier are constantly influx, however during the summer months you have much more melt that was is normally caused by the friction between ice and land....
This melting creates fissures and cracks that pop when form or even when it calves....
So the summer is usually an elevated time with any glacier....
64 posted on 07/12/2010 6:20:00 AM PDT by winoneforthegipper
("If you can't ride two horses at once, you probably shouldn't be in the circus" - SP)