The permeability of crystal-poor obsidian flow and pumice samples from Medicine Lake
Volcano, USA, are measured to assess (1) the existence of a critical vesicularity (porosity) …

Plinian lapilli from the 1060 Common Era Glass Mountain rhyolitic eruption of Medicine Lake
Volcano, California, were collected and analyzed for vesicularity and permeability. A subset …

The open-system degassing of magma controls the bifurcation of explosive and non-
explosive volcanism. Permeable gas flow through connected bubbles is a potentially …

Fragmentation, or the" coming apart" of magma during a plinian eruption, remains one of the
least understood processes in volcanology, although assumptions about the timing and …

The permeability in silicic magmas through connected bubble networks is an important
physical property controlling magmatic degassing. In order to understand the condition of …

Change in permeability during vesiculation has been measured for vesiculated products
from decompression experiments. The permeabilities of the experimental products are less …

Explosive volcanism such as the 1991 Mt. Pinatubo, Philippines, and the 2008 Mt. Chaitén,
Chile, eruptions is caused by violent vesiculation of hydrous magma. However, gas may …

Shear‐induced brittle fractures in vesicular magmas are thought to be possible pathways for
open‐system degassing that controls the explosivity of volcanic eruptions. To investigate the …

The highly transient nature of outgassing commonly observed at volcanoes is in part
controlled by the permeability of lava domes and shallow conduits. Lava domes generally …

Permeability measurement of quenched volcanic porous materials is an important approach
to understand permeability development and degassing of vesicular silicic magmas. In this …