Active crown fire
An active crown fire may also be also called a running crown fire or continuous crown fire. An active crown fire presents a solid wall of flame from the surface through the canopy fuel layers. Flames appear to emanate from the canopy as a whole rather than from individual trees within the canopy.
Active crown fire is one of several types of crown fire and is contrasted with passive crown fire and intermittent crown fire, both of which are less vigorous types of crown fire that do not emit continuous, solid flames from the canopy.