For an effusive volcanic activity how far a andesitic lava can flow? What is the speed?
Eruption amout 0.2 cubic km amount with 25 degree slope.
Andesitic lava is viscous, compared to basaltic lava. Andesitic lava flows at a rate of a few kilometers per hour, whereas basaltic lava can flow up to 10 km/h. Because of their viscosity, andesitic lavas "rarely extend beyound 8 km from their vents".