In order to know how fluid the magma was the researchers needed to measure the .?

In order to know how fluid the magma was, the researchers needed to measure the viscosity. Viscosity indicates how easily magma can flow; lower viscosity allows for more fluid movement, while higher viscosity results in thicker, more resistant magma. By analyzing factors such as temperature, composition, and gas content, scientists can better understand the behavior of magma during volcanic activity.