ABSTRACTOn several documented occasions water in moulins on Storglaciären has risen to a level such that, if a direct connection to the base of the glacier exists, water pressures there would have exceeded the ice overburden pressure. These events were accompanied by audible cracking, and in at least one case by an exceptional discharge of silt-laden water at the snout of the glacier. In one case the zone of high water pressure may have propagated down glacier with a speed of about 150 m·hr-1. In several respects the high water-pressure events on Storglaciären, a non-surging glacier, resemble the mini-surges of Variegated Glacier, Alaska, a surging glacier. If these high water pressure events are, in fact, mini-surges, it is significant that they occur on non-surging glaciers as well as on surging glaciers.