As I recall it, transform "faults" are not really faults. They are the traces left between moving spreading centers. They can be weak zones and be the center

As I recall it, transform "faults" are not really faults. They are the traces left between moving spreading centers. They can be weak zones and be the center of volcanic activity. Magma moving toward a potential eruption is my thought. It's been a long time since I was current in geology. I could be wrong. Our understanding of the world just keeps growing more complicated.