The trees that grow on the lava face yet another type of problem. This lava flow is rich in iron content. This tends to draw lightning strikes to the trees growing in it. This tree was struck in July, 1992. If you look carefully, you can see several other trees that have also been struck by lightning.
Lightning strikes are a common cause of forest fires.
Smoking is another major cause of forest fires, please do not smoke on the trails . This type of lava formation is called a spatter cone. Spatter cones are formed when minor vents form in the molten lava. A surge of hot air rushes through the lava forming surface tubes and minor vents. When the air breaks through the surface, lava will splash out forming a type of blow hole that you see here.