---Flame based---
burner
It can be a bit difficult to see, even in daylight, as it's only revealed by a faint heat haze. If the anomaly is triggered by either a living being or an item, such as a metal bolt, it shoots out a tall pillar of flame in the air, burning everything in its vicinity. Though somewhat rare, the Burner anomaly is most often found in clusters. Some burner anomaly clusters also emit extreme high ambient temperature, which damages and gradually kills anyone in their vicinity.
Comet
The Comet anomaly functions much like an Burner anomaly and deals fire damage, the only difference is that the comet moves at a rapid pace and is very powerful. The comet anomaly, unlike the burner, is very powerful and could kill even a well-protected stalker if one gets directly hit by it.
---Gravity based---
vortex
An anomaly of presumably gravitational nature. When triggered, the tremendous power of the Vortex drags everything within the radius 10-15 meters towards the center. Victims drawn into the core have no chance of survival: their bodies are quickly constricted into a tight lump, only to be blown up in a powerful discharge of energy a moment later. The anomaly remains stationary throughout its lifetime (a week on average). Easily recognizable in daylight by the air fluctuation above, dancing leaves, fragments of dismembered corpses lying around and a distinctive dark stain in the center. Highly dangerous at night since it can be revealed only by means of a detector or by throwing metal objects into it.
Springboard
It was one of the first types of anomalies ever recorded. A Springboard is an unstable gravitational field limited to a pocket on ground level, about 1-2 meters wide. Reacts to the presence of creatures or objects by sending out a powerful shockwave that damages anything within radius. The damage caused by this changes throughout the anomaly's lifetime, ranging from minor bruises through serious wounds to instant death.
Whirligig
A common and dangerous anomaly, that snatches its victims up in the air and spins them at a breakneck speed. The exact nature of the Whirligig remains unknown. The anomaly can be recognized by a light whirlwind of dust above and by body fragments scattered in the vicinity. Victims caught on its outer rim - far enough from the maximum effect zone at the center - can escape the Whirligig with relatively minor injuries.