Hyaloclastite ridges, formed by subglacial eruptions during the last glacial period, are a prominent landscape feature of Iceland and British Columbia.
12.
As many glaciers overlie active volcanoes, subglacial eruptions can pose hazards due to sudden floods produced by glacial meltwater, known as j�kulhlaups.
13.
The last confirmed eruption was in 1910 when Tephra was erupted, but may also have had subglacial eruptions in, 1986, 1991, 2006 and 2008.
14.
"' Subglacial eruptions "', those of ice-covered volcanoes, result in the interaction of magma with ice and snow, leading to meltwater formation, j�kulhlaups, and lahars.
15.
Scientists monitoring the activity said speculation that it was caused by a " very small " subglacial eruption lacked confirmation by visual or seismic evidence.
16.
A new study of volcanic activity beneath Iceland's Vatnajokull ice cap suggests that some subglacial eruptions have little long-term effect on the stability of ice sheets.
17.
Bill Mathews suggested that these esker-like lava flows were deposited during subglacial eruptions that traveled away from the vent inside tunnels or trenches melted in the overlying ice sheet.
18.
The variety of different volcanic deposits is partly due to changes in eruption characteristics from mainly subaerial eruptions to broadly subglacial eruptions throughout the history of the Northern Cordilleran Volcanic Province.
19.
This is particularly relevant given that subglacial eruptions have recently demonstrated their ability to cause widespread impact, with the ash cloud associated with Iceland s Eyjafjallaj�kull eruption resulting in significant impacts to aviation across Europe.
20.
The first subglacial eruption between 54 and 40 thousand years ago produced lava domes and monomict breccia, while the other subglacial eruption between 40 and 30 thousand years ago took place under thinner glacial ice.
