How Does Magma Viscosity Affect The Type Of Volcanic Eruption?

How Does Magma Viscosity Affect The Type Of Volcanic Eruption? The viscosity of the magma, however, is also an important factor in determining whether an eruption will be explosive or nonexplosive. A low-viscosity magma, like basalt, will allow the escaping gases to migrate rapidly through the magma and escape to the surface. How does magma