what is a mudflow
Mailboxes caught in a mudflow. A mudflow or mud flow is a form of mass wasting involving very rapid to extremely rapid surging flow of debris that has become partially or fully liquified by the addition of significant amounts of water to the source material.irectly in the path of the huge mudflow was Spirit Lake. Normally a chilly 5Â°C, the lahar instantly raised the temperature to near 38Â°C. Today the bottom of Spirit Lake is 100 feet above the original surface. The lake now has two and a half times more surface area than it did before the eruption.