In which region do earthquakes, originate due to a transform boundary, most likely occur

Majority are found on the sea floors with two ocean ridges. Example of this is in California.

Answer: ectonic earthquakes occur anywhere in the earth where there is sufficient stored elastic strain energy to drive fracture propagation along a fault plane. The sides of a fault move past each other smoothly and aseismically only if there are no irregularities or asperities along the fault surface that increase the frictional resistance. Most fault surfaces do have such asperities and this leads to a form of stick-slip behavior.