What Causes A Quiet Volcanic Eruption?

What Causes A Quiet Volcanic Eruption? Volcanoes that have very hot, low-silica magma generally erupt quietly. In a quiet eruption, lava erupts in a stream of low-viscosity lava, called a lava flow. Lava flows from a quiet eruption can travel for great distances. What are the signs before volcanic eruption? An increase in the frequency