What type of ground fire is characterized as slow-moving and smoldering, often undetected for months?

Ground fires are indeed characterized as slow-moving and smoldering fires that can often go undetected for prolonged periods, sometimes for months. These fires occur beneath the surface of the soil, consuming organic material such as roots, and are typically fueled by moss, peat, or other vegetation on the ground. Because they burn underground, ground fires can be particularly insidious, allowing them to evade detection until they either surface or cause significant damage. Their slow-moving nature makes them distinct from surface or crown fires, which are more visible and often spread more rapidly. This characteristic of smoldering and being undetected highlights the importance of thorough inspection and monitoring in areas prone to ground fires to prevent potential flare-ups or hazards to surrounding environments.